From dcf39e668f2a42a311433009bcfdd31ed93039ac Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Tue, 7 Apr 2026 08:51:23 +1000
Subject: [PATCH 01/20] Initial attempt at supporting Cesium for Unity on
 Linux.

---
 .github/workflows/build.yml                  | 131 ++++++++++++++++++-
 Build~/Package.cs                            |  23 ++++
 EditorTests/CesiumEditorTests.asmdef         |   3 +-
 Source/CesiumForUnity.asmdef                 |   4 +-
 Source/Editor/BuildCesiumForUnity.cs         |  17 +++
 Tests/CesiumTests.asmdef                     |   3 +-
 native~/vcpkg/triplets/x64-linux-unity.cmake |   7 +
 7 files changed, 180 insertions(+), 8 deletions(-)
 create mode 100644 native~/vcpkg/triplets/x64-linux-unity.cmake

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 16a4626e..c6636cec 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -340,6 +340,116 @@ jobs:
           name: Tests - macOS
           path: /Users/runner/cesium/CesiumForUnityBuildProject/TestResults.xml
           reporter: dotnet-nunit
+  Linux:
+    needs: [QuickChecks]
+    runs-on: ubuntu-latest
+    # Only allow a single Linux build at a time, for Unity licensing reasons
+    concurrency: linux
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Set up .NET SDK
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: "10.0.103"
+      - name: Cache vcpkg artifacts
+        uses: actions/cache@v4
+        with:
+          path: "~/.ezvcpkg"
+          key: vcpkg-linux-${{ hashFiles('native~/vcpkg/ports/**/vcpkg.json', 'native~/vcpkg/triplets/**/*', 'native~/extern/*toolchain.cmake') }}-${{ hashFiles('native~/extern/cesium-native/CMakeLists.txt', 'native~/CMakeLists.txt') }}
+          restore-keys: |
+            vcpkg-linux-${{ hashFiles('native~/vcpkg/ports/**/vcpkg.json', 'native~/vcpkg/triplets/**/*', 'native~/extern/*toolchain.cmake') }}-
+      - name: Install nasm
+        uses: ilammy/setup-nasm@v1.5.1
+      - name: Install Unity Hub
+        run: |
+          wget -qO - https://hub.unity3d.com/linux/repos/apt/conf/pubkey.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/Unity_Technologies_ApS.gpg > /dev/null
+          sudo sh -c 'echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/apt stable main" > /etc/apt/sources.list.d/unityhub.list'
+          sudo apt-get update
+          sudo apt-get install -y unityhub
+      - name: Install Unity 2022.3.41f1
+        # This command sometimes returns exit code 130, despite actually succeeding.
+        continue-on-error: true
+        run: |
+          /opt/unityhub/unityhub -- --headless install --version 2022.3.41f1 --changeset 0f988161febf
+      - name: Configure Unity to Use the License Server
+        run: |
+          sudo mkdir -p /etc/unity3d/config
+          sudo bash -c 'echo "{\"licensingServiceBaseUrl\": \"http://localhost:12331\",\"enableEntitlementLicensing\": true,\"clientConnectTimeoutSec\": 60,\"clientHandshakeTimeoutSec\": 120,\"toolset\":\"UnityLicenseServer_16768262570522_9\"}" > /etc/unity3d/config/services-config.json'
+      - name: Create SSH tunnel to Unity License Server
+        env:
+          UNITY_LICENSE_SERVER_SSH_KEY: ${{ secrets.UNITY_LICENSE_SERVER_SSH_KEY }}
+        run: |
+          echo "$UNITY_LICENSE_SERVER_SSH_KEY" > ~/unity-client-ssh-key
+          chmod 600 ~/unity-client-ssh-key
+          # Without StrictHostKeyChecking, OpenSSH will sit forever waiting for local input to confirm the server key is ok.
+          # We don't really care if the server is authentic, because we're not sending anything sensitive to it.
+          # The license server VM's sshd_config also needed to be modified with the following options, in order to prevent
+          # the tunnel from being closed between here and when we're ready to use it.
+          #   TCPKeepAlive yes
+          #   ClientAliveInterval 30
+          #   ClientAliveCountMax 9999
+          ssh -fNT -o StrictHostKeyChecking=no -i ~/unity-client-ssh-key -L 127.0.0.1:12331:127.0.0.1:8080 unity-client@ec2-44-204-244-196.compute-1.amazonaws.com
+          sleep 5
+      - name: Test Connection to Unity License Server
+        run: |
+          wget http://127.0.0.1:12331/v1/admin/status
+          cat status
+          rm status
+      - name: Update the version in Cesium.cpp
+        run: |
+          export VERSION=$(jq -r ".version" package.json)
+          export COMMIT=$(git rev-parse --short HEAD)
+          sed -i 's/Cesium::version = "Development Build"/Cesium::version = "'$VERSION'"/g' native~/src/Runtime/Cesium.cpp
+          sed -i 's/Cesium::commit = "Unknown"/Cesium::commit = "'$COMMIT'"/g' native~/src/Runtime/Cesium.cpp
+          # Sanity check that the replacements happened
+          grep $VERSION native~/src/Runtime/Cesium.cpp
+          grep $COMMIT native~/src/Runtime/Cesium.cpp
+      - name: Move cesium-unity Repo Under Empty Project
+        run: |
+          mkdir -p ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity
+          mv $GITHUB_WORKSPACE/* ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity
+          # Disable Unity audio
+          mkdir -p ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity/ProjectSettings
+          echo '%YAML 1.1\n%TAG !u! tag:unity3d.com,2011:\n--- !u!11 &1\nAudioManager:\n  m_DisableAudio: 1\n' > ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity/ProjectSettings/AudioManager.asset
+      - name: Build Reinterop
+        run: |
+          cd ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity
+          dotnet publish Reinterop~ -o .
+      - name: Build Package
+        run: |
+          # We only need a release build of vcpkg dependencies
+          export CESIUM_VCPKG_RELEASE_ONLY="TRUE"
+          cd ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity
+          dotnet run --project Build~ package --platform Editor --platform Linux
+          ls -l ~/cesium/CesiumForUnityBuildProject
+      - name: Publish Logs
+        if: success() || failure()    # run this step even if previous step failed
+        uses: actions/upload-artifact@v4
+        with:
+          name: Native Build Logs - Linux
+          path: ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity/native~/build-*/build.log
+      - name: Publish package artifact
+        if: ${{ success() }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: Linux Package
+          path: ~/cesium/CesiumForUnityBuildProject/*.tgz
+      - name: Run Tests
+        env:
+          CESIUM_ION_TOKEN_FOR_TESTS: ${{ secrets.CESIUM_ION_TOKEN_FOR_TESTS }}
+        run: |
+          ~/Unity/Hub/Editor/2022.3.41f1/Editor/Unity -runTests -batchmode -projectPath ~/cesium/CesiumForUnityBuildProject -testResults ~/cesium/CesiumForUnityBuildProject/TestResults.xml -testPlatform PlayMode -logFile ~/cesium/CesiumForUnityBuildProject/test-log.txt
+          cat ~/cesium/CesiumForUnityBuildProject/test-log.txt
+      - name: Test Report
+        uses: kring/test-reporter@v1.6.2-kring
+        if: success() || failure()    # run this step even if previous step failed
+        with:
+          name: Tests - Linux
+          path: ~/cesium/CesiumForUnityBuildProject/TestResults.xml
+          reporter: dotnet-nunit
   Emscripten:
     needs: [QuickChecks]
     runs-on: windows-latest
@@ -466,7 +576,7 @@ jobs:
           path: d:\cesium\CesiumForUnityBuildProject\*.tgz
   Combine:
     runs-on: ubuntu-latest
-    needs: [Windows, MacOS, Emscripten]
+    needs: [Windows, MacOS, Linux, Emscripten]
     steps:
       - name: Check out repository code
         uses: actions/checkout@v4
@@ -492,6 +602,16 @@ jobs:
           cd combine/emscripten
           tar xzf *.tgz
           rm *.tgz
+      - name: Download Linux build
+        uses: actions/download-artifact@v4
+        with:
+          name: Linux Package
+          path: combine/linux
+      - name: Extract Linux build
+        run: |
+          cd combine/linux
+          tar xzf *.tgz
+          rm *.tgz
       - name: Download Windows build
         uses: actions/download-artifact@v4
         with:
@@ -510,6 +630,7 @@ jobs:
           # Copy the everything. For files that exist in multiple packages, the Windows one will win.
           cp -r ../macos/* .
           cp -r ../emscripten/* .
+          cp -r ../linux/* .
           cp -r ../windows/* .
           
           # Remove the generated C# files
@@ -534,6 +655,14 @@ jobs:
             cat "$file" >> "../merged/$file"
           done;
 
+          cd ../linux
+          for file in $(find package/Source/generated -name '*.cs');
+          do
+            echo Merging $file
+            mkdir -p $(dirname "../merged/$file")
+            cat "$file" >> "../merged/$file"
+          done;
+
           cd ../windows
           for file in $(find package/Source/generated -name '*.cs');
           do
diff --git a/Build~/Package.cs b/Build~/Package.cs
index 6c833f03..35f7feed 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -279,6 +279,29 @@ public void Run(Options options)
                     Directory.CreateDirectory(generatedPath);
                 }
 
+                if (options.Platforms.Contains("Linux"))
+                {
+                    Console.WriteLine("**** Compiling for Linux Player");
+                    unity.Run(new[]
+                    {
+                        "-batchmode",
+                        "-nographics",
+                        "-projectPath",
+                        Utility.ProjectRoot,
+                        "-buildTarget",
+                        "Linux64",
+                        "-executeMethod",
+                        "CesiumForUnity.BuildCesiumForUnity.CompileForLinuxAndExit"
+                    });
+
+                    Console.WriteLine("**** Adding generated files (for the Linux Player) to the package");
+                    AddGeneratedFiles("!UNITY_EDITOR && UNITY_STANDALONE_LINUX", generatedPath, outputGeneratedPath);
+
+                    // Clean the generated code directory.
+                    Directory.Delete(generatedPath, true);
+                    Directory.CreateDirectory(generatedPath);
+                }
+
                 if (options.Platforms.Contains("macOS"))
                 {
                     Console.WriteLine("**** Compiling for macOS Player");
diff --git a/EditorTests/CesiumEditorTests.asmdef b/EditorTests/CesiumEditorTests.asmdef
index bd7e50ee..b045a4b9 100644
--- a/EditorTests/CesiumEditorTests.asmdef
+++ b/EditorTests/CesiumEditorTests.asmdef
@@ -18,8 +18,7 @@
     ],
     "autoReferenced": false,
     "defineConstraints": [
-        "UNITY_INCLUDE_TESTS",
-        "!UNITY_EDITOR_LINUX"
+        "UNITY_INCLUDE_TESTS"
     ],
     "versionDefines": [],
     "noEngineReferences": false
diff --git a/Source/CesiumForUnity.asmdef b/Source/CesiumForUnity.asmdef
index 9da72537..58e5dfd1 100644
--- a/Source/CesiumForUnity.asmdef
+++ b/Source/CesiumForUnity.asmdef
@@ -20,9 +20,7 @@
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,
-    "defineConstraints": [
-        "!UNITY_EDITOR_LINUX"
-    ],
+    "defineConstraints": [],
     "versionDefines": [
         {
             "name": "com.unity.splines",
diff --git a/Source/Editor/BuildCesiumForUnity.cs b/Source/Editor/BuildCesiumForUnity.cs
index d35946fe..42f935a8 100644
--- a/Source/Editor/BuildCesiumForUnity.cs
+++ b/Source/Editor/BuildCesiumForUnity.cs
@@ -126,6 +126,23 @@ public static void CompileForWindowsAndExit()
             EditorApplication.Exit(0);
         }
 
+        public static void CompileForLinuxAndExit()
+        {
+            CompileCesiumForUnityNative.ExitAfterCompile = true;
+
+            string buildPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
+            Directory.CreateDirectory(buildPath);
+            try
+            {
+                BuildPlayer(BuildTargetGroup.Standalone, BuildTarget.StandaloneLinux64, Path.Combine(buildPath, "Linux"));
+            }
+            finally
+            {
+                Directory.Delete(buildPath, true);
+            }
+            EditorApplication.Exit(0);
+        }
+
         public static void CompileForMacAndExit()
         {
             CompileCesiumForUnityNative.ExitAfterCompile = true;
diff --git a/Tests/CesiumTests.asmdef b/Tests/CesiumTests.asmdef
index f184b0b8..001e8466 100644
--- a/Tests/CesiumTests.asmdef
+++ b/Tests/CesiumTests.asmdef
@@ -17,8 +17,7 @@
     ],
     "autoReferenced": false,
     "defineConstraints": [
-        "UNITY_INCLUDE_TESTS",
-        "!UNITY_EDITOR_LINUX"
+        "UNITY_INCLUDE_TESTS"
     ],
     "versionDefines": [
         {
diff --git a/native~/vcpkg/triplets/x64-linux-unity.cmake b/native~/vcpkg/triplets/x64-linux-unity.cmake
new file mode 100644
index 00000000..6d18ae28
--- /dev/null
+++ b/native~/vcpkg/triplets/x64-linux-unity.cmake
@@ -0,0 +1,7 @@
+include("${CMAKE_CURRENT_LIST_DIR}/shared/common.cmake")
+
+set(VCPKG_TARGET_ARCHITECTURE x64)
+set(VCPKG_CRT_LINKAGE dynamic)
+set(VCPKG_LIBRARY_LINKAGE static)
+
+set(VCPKG_CMAKE_SYSTEM_NAME Linux)

From b7fa5a5561623645777144b3fc8436fa18f1905e Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Tue, 7 Apr 2026 08:59:53 +1000
Subject: [PATCH 02/20] Fix UnityHub installation on Linux.

---
 .github/workflows/build.yml | 7 ++++---
 Build~/Unity.cs             | 5 +++++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c6636cec..47f142d4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -365,15 +365,16 @@ jobs:
         uses: ilammy/setup-nasm@v1.5.1
       - name: Install Unity Hub
         run: |
-          wget -qO - https://hub.unity3d.com/linux/repos/apt/conf/pubkey.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/Unity_Technologies_ApS.gpg > /dev/null
-          sudo sh -c 'echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/apt stable main" > /etc/apt/sources.list.d/unityhub.list'
+          sudo apt-get install -y gnupg libgbm1
+          wget -qO - https://hub.unity3d.com/linux/keys/public | gpg --dearmor | sudo tee /usr/share/keyrings/Unity_Technologies_ApS.gpg > /dev/null
+          sudo sh -c 'echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/deb stable main" > /etc/apt/sources.list.d/unityhub.list'
           sudo apt-get update
           sudo apt-get install -y unityhub
       - name: Install Unity 2022.3.41f1
         # This command sometimes returns exit code 130, despite actually succeeding.
         continue-on-error: true
         run: |
-          /opt/unityhub/unityhub -- --headless install --version 2022.3.41f1 --changeset 0f988161febf
+          /opt/unityhub/unityhub-bin --no-sandbox --headless install --version 2022.3.41f1 --changeset 0f988161febf
       - name: Configure Unity to Use the License Server
         run: |
           sudo mkdir -p /etc/unity3d/config
diff --git a/Build~/Unity.cs b/Build~/Unity.cs
index d5e753dd..275ffae4 100644
--- a/Build~/Unity.cs
+++ b/Build~/Unity.cs
@@ -133,6 +133,11 @@ private class UnityVersion
                 unityDefaultBaseDirectory = new DirectoryInfo("/Applications/Unity/Hub/Editor");
                 unityExecutableSubPath = "Unity.app/Contents/MacOS/Unity";
             }
+            else if (OperatingSystem.IsLinux())
+            {
+                unityDefaultBaseDirectory = new DirectoryInfo(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Unity", "Hub", "Editor"));
+                unityExecutableSubPath = "Editor/Unity";
+            }
             else
             {
                 return null;

From 1757b0da5373c5a5ca3f0ccdf8de7f888006d738 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Tue, 7 Apr 2026 09:29:55 +1000
Subject: [PATCH 03/20] Fix Linux Editor installation.

---
 .github/workflows/build.yml | 5 +++--
 Build~/Unity.cs             | 3 +++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 47f142d4..d14590f2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -365,16 +365,17 @@ jobs:
         uses: ilammy/setup-nasm@v1.5.1
       - name: Install Unity Hub
         run: |
-          sudo apt-get install -y gnupg libgbm1
+          sudo apt-get install -y gnupg libgbm1 xvfb
           wget -qO - https://hub.unity3d.com/linux/keys/public | gpg --dearmor | sudo tee /usr/share/keyrings/Unity_Technologies_ApS.gpg > /dev/null
           sudo sh -c 'echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/deb stable main" > /etc/apt/sources.list.d/unityhub.list'
           sudo apt-get update
           sudo apt-get install -y unityhub
       - name: Install Unity 2022.3.41f1
         # This command sometimes returns exit code 130, despite actually succeeding.
+        # unityhub-bin requires a virtual display even in headless mode.
         continue-on-error: true
         run: |
-          /opt/unityhub/unityhub-bin --no-sandbox --headless install --version 2022.3.41f1 --changeset 0f988161febf
+          xvfb-run -a /opt/unityhub/unityhub-bin --no-sandbox --headless install --version 2022.3.41f1 --changeset 0f988161febf
       - name: Configure Unity to Use the License Server
         run: |
           sudo mkdir -p /etc/unity3d/config
diff --git a/Build~/Unity.cs b/Build~/Unity.cs
index 275ffae4..5a0149ad 100644
--- a/Build~/Unity.cs
+++ b/Build~/Unity.cs
@@ -146,6 +146,9 @@ private class UnityVersion
             if (unityDir == null)
                 unityDir = unityDefaultBaseDirectory;
 
+            if (!unityDir.Exists)
+                return null;
+
             if (version != null)
             {
                 FileInfo unityExecutable = new FileInfo(Path.Combine(unityDir.FullName, version, unityExecutableSubPath));

From 60cc773fad6966857380ddcd1d2cfce0befd4015 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Tue, 7 Apr 2026 09:56:25 +1000
Subject: [PATCH 04/20] Fix path to services-config.json.

---
 .github/workflows/build.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d14590f2..c1acfd35 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -378,8 +378,8 @@ jobs:
           xvfb-run -a /opt/unityhub/unityhub-bin --no-sandbox --headless install --version 2022.3.41f1 --changeset 0f988161febf
       - name: Configure Unity to Use the License Server
         run: |
-          sudo mkdir -p /etc/unity3d/config
-          sudo bash -c 'echo "{\"licensingServiceBaseUrl\": \"http://localhost:12331\",\"enableEntitlementLicensing\": true,\"clientConnectTimeoutSec\": 60,\"clientHandshakeTimeoutSec\": 120,\"toolset\":\"UnityLicenseServer_16768262570522_9\"}" > /etc/unity3d/config/services-config.json'
+          sudo mkdir -p /usr/share/unity3d/config
+          sudo bash -c 'echo "{\"licensingServiceBaseUrl\": \"http://localhost:12331\",\"enableEntitlementLicensing\": true,\"clientConnectTimeoutSec\": 60,\"clientHandshakeTimeoutSec\": 120,\"toolset\":\"UnityLicenseServer_16768262570522_9\"}" > /usr/share/unity3d/config/services-config.json'
       - name: Create SSH tunnel to Unity License Server
         env:
           UNITY_LICENSE_SERVER_SSH_KEY: ${{ secrets.UNITY_LICENSE_SERVER_SSH_KEY }}

From 0f78f47c2782bee1d775f81c163d1309a8a70259 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Tue, 7 Apr 2026 11:29:38 +1000
Subject: [PATCH 05/20] Include LinuxStandalone64 in CesiumForUnity.asmdef.

---
 Source/CesiumForUnity.asmdef | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Source/CesiumForUnity.asmdef b/Source/CesiumForUnity.asmdef
index 58e5dfd1..0d2d017c 100644
--- a/Source/CesiumForUnity.asmdef
+++ b/Source/CesiumForUnity.asmdef
@@ -10,6 +10,7 @@
         "Android",
         "Editor",
         "iOS",
+        "LinuxStandalone64",
         "macOSStandalone",
         "WSA",
         "WindowsStandalone64",

From d287e885bc962ce3342badd6922e2bfab17c2dc5 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Fri, 24 Apr 2026 20:31:15 +1000
Subject: [PATCH 06/20] Use xvfb-run to run the tests.

The lack of a X framebufffer is probably the reason the tests are failing instantly.
---
 .github/workflows/build.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c1acfd35..85160e96 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -443,7 +443,7 @@ jobs:
         env:
           CESIUM_ION_TOKEN_FOR_TESTS: ${{ secrets.CESIUM_ION_TOKEN_FOR_TESTS }}
         run: |
-          ~/Unity/Hub/Editor/2022.3.41f1/Editor/Unity -runTests -batchmode -projectPath ~/cesium/CesiumForUnityBuildProject -testResults ~/cesium/CesiumForUnityBuildProject/TestResults.xml -testPlatform PlayMode -logFile ~/cesium/CesiumForUnityBuildProject/test-log.txt
+          xvfb-run -a ~/Unity/Hub/Editor/2022.3.41f1/Editor/Unity -runTests -batchmode -projectPath ~/cesium/CesiumForUnityBuildProject -testResults ~/cesium/CesiumForUnityBuildProject/TestResults.xml -testPlatform PlayMode -logFile ~/cesium/CesiumForUnityBuildProject/test-log.txt
           cat ~/cesium/CesiumForUnityBuildProject/test-log.txt
       - name: Test Report
         uses: kring/test-reporter@v1.6.2-kring

From 3b298394e2593d4d831ca11fe9faf670066b7639 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Fri, 24 Apr 2026 21:30:22 +1000
Subject: [PATCH 07/20] Use updated URL for Unity hub installers.

---
 .github/workflows/build.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 85160e96..c3b8b88d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -73,7 +73,7 @@ jobs:
           choco install -y wget
       - name: Install Unity Hub
         run: |
-          wget https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup.exe
+          wget https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup-x64.exe
           Start-Process "./UnityHubSetup.exe" -Args "/S" -Wait
           del ./UnityHubSetup.exe
       - name: Install Unity
@@ -229,7 +229,7 @@ jobs:
         uses: ilammy/setup-nasm@v1.5.1
       - name: Install Unity Hub
         run: |
-          wget --quiet https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup.dmg
+          wget --quiet https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup-arm64.dmg
           mkdir UnityHubSetup
           hdiutil attach UnityHubSetup.dmg -mountpoint ./UnityHubSetup
           sudo cp -R "./UnityHubSetup/Unity Hub.app" /Applications
@@ -484,7 +484,7 @@ jobs:
           choco install -y wget
       - name: Install Unity Hub
         run: |
-          wget https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup.exe
+          wget https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup-x64.exe
           Start-Process "./UnityHubSetup.exe" -Args "/S" -Wait
           del ./UnityHubSetup.exe
       - name: Install Unity

From 6c86bbe7faad1145ee9c618e795d17a3e6bfd507 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Fri, 24 Apr 2026 21:35:12 +1000
Subject: [PATCH 08/20] Run the correct executable, too.

---
 .github/workflows/build.yml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c3b8b88d..1af067a3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -74,8 +74,8 @@ jobs:
       - name: Install Unity Hub
         run: |
           wget https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup-x64.exe
-          Start-Process "./UnityHubSetup.exe" -Args "/S" -Wait
-          del ./UnityHubSetup.exe
+          Start-Process "./UnityHubSetup-x64.exe" -Args "/S" -Wait
+          del ./UnityHubSetup-x64.exe
       - name: Install Unity
         run: |
           Start-Process -FilePath "C:/Program Files/Unity Hub/Unity Hub.exe" -Args "-- --headless install --version 2022.3.41f1 --changeset 0f988161febf" -Wait
@@ -231,10 +231,10 @@ jobs:
         run: |
           wget --quiet https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup-arm64.dmg
           mkdir UnityHubSetup
-          hdiutil attach UnityHubSetup.dmg -mountpoint ./UnityHubSetup
+          hdiutil attach UnityHubSetup-arm64.dmg -mountpoint ./UnityHubSetup
           sudo cp -R "./UnityHubSetup/Unity Hub.app" /Applications
           hdiutil detach ./UnityHubSetup
-          rm ./UnityHubSetup.dmg
+          rm ./UnityHubSetup-arm64.dmg
       - name: Install Unity 2022.3.41f1
         # This command sometimes returns exit code 130, despite actually succeeding.
         continue-on-error: true
@@ -485,8 +485,8 @@ jobs:
       - name: Install Unity Hub
         run: |
           wget https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup-x64.exe
-          Start-Process "./UnityHubSetup.exe" -Args "/S" -Wait
-          del ./UnityHubSetup.exe
+          Start-Process "./UnityHubSetup-x64.exe" -Args "/S" -Wait
+          del ./UnityHubSetup-x64.exe
       - name: Install Unity
         run: |
           # We must use Unity 6+ because the Emscripten version in older releases is too old.

From 590d29620ad683b1241428f2d0b596e0258ffa7b Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Fri, 24 Apr 2026 21:41:23 +1000
Subject: [PATCH 09/20] Attempt to build native Linux code in an almalinux8
 container.

---
 .github/workflows/build.yml                  |  8 +--
 Build~/Package.cs                            | 74 ++++++++++++++++++-
 Source/Editor/CompileCesiumForUnityNative.cs | 76 +++++++++++++++++++-
 3 files changed, 150 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1af067a3..7382d833 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -358,11 +358,9 @@ jobs:
         uses: actions/cache@v4
         with:
           path: "~/.ezvcpkg"
-          key: vcpkg-linux-${{ hashFiles('native~/vcpkg/ports/**/vcpkg.json', 'native~/vcpkg/triplets/**/*', 'native~/extern/*toolchain.cmake') }}-${{ hashFiles('native~/extern/cesium-native/CMakeLists.txt', 'native~/CMakeLists.txt') }}
+          key: vcpkg-linux-alma-${{ hashFiles('native~/vcpkg/ports/**/vcpkg.json', 'native~/vcpkg/triplets/**/*', 'native~/extern/*toolchain.cmake') }}-${{ hashFiles('native~/extern/cesium-native/CMakeLists.txt', 'native~/CMakeLists.txt') }}
           restore-keys: |
-            vcpkg-linux-${{ hashFiles('native~/vcpkg/ports/**/vcpkg.json', 'native~/vcpkg/triplets/**/*', 'native~/extern/*toolchain.cmake') }}-
-      - name: Install nasm
-        uses: ilammy/setup-nasm@v1.5.1
+            vcpkg-linux-alma-${{ hashFiles('native~/vcpkg/ports/**/vcpkg.json', 'native~/vcpkg/triplets/**/*', 'native~/extern/*toolchain.cmake') }}-
       - name: Install Unity Hub
         run: |
           sudo apt-get install -y gnupg libgbm1 xvfb
@@ -421,6 +419,8 @@ jobs:
           cd ~/cesium/CesiumForUnityBuildProject/Packages/com.cesium.unity
           dotnet publish Reinterop~ -o .
       - name: Build Package
+        env:
+          CESIUM_NATIVE_BUILD_CONTAINER: almalinux:8
         run: |
           # We only need a release build of vcpkg dependencies
           export CESIUM_VCPKG_RELEASE_ONLY="TRUE"
diff --git a/Build~/Package.cs b/Build~/Package.cs
index 35f7feed..efbe1f4b 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -181,8 +181,14 @@ public void Run(Options options)
                     else
                     {
                         // On other platforms, just build once.
-                        Utility.Run("cmake", configureArgs);
-                        Utility.Run("cmake", buildArgs);
+                        string? containerImage = Environment.GetEnvironmentVariable("CESIUM_NATIVE_BUILD_CONTAINER");
+                        if (OperatingSystem.IsLinux() && !string.IsNullOrEmpty(containerImage))
+                            RunCmakeInContainer(containerImage, configureArgs, buildArgs);
+                        else
+                        {
+                            Utility.Run("cmake", configureArgs);
+                            Utility.Run("cmake", buildArgs);
+                        }
                     }
                 }
 
@@ -391,6 +397,70 @@ private static void TraverseDirectoryRecursively(string directory, string builtP
             }
         }
 
+        private static void RunCmakeInContainer(
+            string containerImage,
+            IEnumerable<string> configureArgs,
+            IEnumerable<string> buildArgs)
+        {
+            string packageRoot = Utility.PackageRoot;
+            string ezvcpkgHostPath = Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".ezvcpkg");
+
+            // Write cmake commands to a script file to avoid shell quoting complexity.
+            string scriptPath = Path.Combine(Path.GetTempPath(), $"cesium-cmake-{Guid.NewGuid():N}.sh");
+            File.WriteAllText(scriptPath,
+                "#!/bin/bash\n" +
+                "set -e\n" +
+                "dnf module enable -y llvm-toolset\n" +
+                "dnf install -q -y clang cmake make nasm\n" +
+                $"cmake {string.Join(' ', configureArgs)}\n" +
+                $"cmake {string.Join(' ', buildArgs)}\n",
+                Encoding.UTF8);
+
+            try
+            {
+                ProcessStartInfo dockerInfo = new ProcessStartInfo("docker");
+                dockerInfo.WorkingDirectory = packageRoot;
+
+                dockerInfo.ArgumentList.Add("run");
+                dockerInfo.ArgumentList.Add("--rm");
+                dockerInfo.ArgumentList.Add("--workdir");
+                dockerInfo.ArgumentList.Add(packageRoot);
+                dockerInfo.ArgumentList.Add("-v");
+                dockerInfo.ArgumentList.Add($"{packageRoot}:{packageRoot}");
+                dockerInfo.ArgumentList.Add("-v");
+                dockerInfo.ArgumentList.Add($"{ezvcpkgHostPath}:/root/.ezvcpkg");
+                dockerInfo.ArgumentList.Add("-v");
+                dockerInfo.ArgumentList.Add($"{scriptPath}:/tmp/cesium-build.sh:ro");
+                dockerInfo.ArgumentList.Add("-e");
+                dockerInfo.ArgumentList.Add("CC=clang");
+                dockerInfo.ArgumentList.Add("-e");
+                dockerInfo.ArgumentList.Add("CXX=clang++");
+
+                foreach (string envVarName in new[] {
+                    "VCPKG_BINARY_SOURCES", "AWS_ACCESS_KEY_ID", "AWS_SECRET_ACCESS_KEY",
+                    "AWS_REGION", "CESIUM_VCPKG_RELEASE_ONLY" })
+                {
+                    string? value = Environment.GetEnvironmentVariable(envVarName);
+                    if (!string.IsNullOrEmpty(value))
+                    {
+                        dockerInfo.ArgumentList.Add("-e");
+                        dockerInfo.ArgumentList.Add($"{envVarName}={value}");
+                    }
+                }
+
+                dockerInfo.ArgumentList.Add(containerImage);
+                dockerInfo.ArgumentList.Add("bash");
+                dockerInfo.ArgumentList.Add("/tmp/cesium-build.sh");
+
+                Utility.RunAndLog(dockerInfo);
+            }
+            finally
+            {
+                try { File.Delete(scriptPath); } catch (Exception) { }
+            }
+        }
+
         private static void AddGeneratedFiles(string condition, string source, string target)
         {
             TraverseDirectoryRecursively(
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index 3ad409e1..986f367f 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -632,8 +632,15 @@ internal static void BuildNativeLibrary(LibraryToBuild library)
                         args.Add($"-DCMAKE_TOOLCHAIN_FILE=\"{library.Toolchain}\"");
 
                     startInfo.Arguments = string.Join(' ', args);
+                    string configureArgsStr = startInfo.Arguments;
 
-                    RunAndLog(startInfo, log, logFilename);
+                    string? containerImage = Environment.GetEnvironmentVariable("CESIUM_NATIVE_BUILD_CONTAINER");
+                    bool useContainer = !string.IsNullOrEmpty(containerImage) &&
+                        SystemInfo.operatingSystemFamily == OperatingSystemFamily.Linux &&
+                        library.Platform == BuildTarget.StandaloneLinux64;
+
+                    if (!useContainer)
+                        RunAndLog(startInfo, log, logFilename);
 
                     if (library.Platform == BuildTarget.WebGL)
                         startInfo.FileName = "cmake";
@@ -651,7 +658,12 @@ internal static void BuildNativeLibrary(LibraryToBuild library)
                     };
                     args.AddRange(library.ExtraBuildArgs);
                     startInfo.Arguments = string.Join(' ', args);
-                    RunAndLog(startInfo, log, logFilename);
+                    string buildArgsStr = startInfo.Arguments;
+
+                    if (useContainer)
+                        RunCmakeInContainer(containerImage!, library, configureArgsStr, buildArgsStr, log, logFilename);
+                    else
+                        RunAndLog(startInfo, log, logFilename);
 
                     // Refresh the asset database for platforms that use static linking so the Unity
                     // builder can find the libraries.
@@ -682,6 +694,66 @@ internal static void BuildNativeLibrary(LibraryToBuild library)
             }
         }
 
+        private static void RunCmakeInContainer(
+            string containerImage,
+            LibraryToBuild library,
+            string configureArgs,
+            string buildArgs,
+            StreamWriter log,
+            string logFilename)
+        {
+            string packageRoot = Path.GetDirectoryName(library.SourceDirectory)!;
+            string ezvcpkgHostPath = Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".ezvcpkg");
+
+            // Write cmake commands to a script file to avoid shell quoting complexity.
+            string scriptPath = Path.Combine(Path.GetTempPath(), $"cesium-cmake-{Guid.NewGuid():N}.sh");
+            File.WriteAllText(scriptPath,
+                "#!/bin/bash\n" +
+                "set -e\n" +
+                "dnf module enable -y llvm-toolset\n" +
+                "dnf install -q -y clang cmake make nasm\n" +
+                $"cmake {configureArgs}\n" +
+                $"cmake {buildArgs}\n",
+                Encoding.UTF8);
+
+            try
+            {
+                ProcessStartInfo dockerInfo = new ProcessStartInfo("docker");
+                dockerInfo.UseShellExecute = false;
+                dockerInfo.CreateNoWindow = true;
+                dockerInfo.WorkingDirectory = library.SourceDirectory;
+                dockerInfo.RedirectStandardError = true;
+                dockerInfo.RedirectStandardOutput = true;
+
+                StringBuilder dockerArgsBuilder = new StringBuilder("run --rm");
+                dockerArgsBuilder.Append($" --workdir \"{library.SourceDirectory}\"");
+                dockerArgsBuilder.Append($" -v \"{packageRoot}:{packageRoot}\"");
+                dockerArgsBuilder.Append($" -v \"{ezvcpkgHostPath}:/root/.ezvcpkg\"");
+                dockerArgsBuilder.Append($" -v \"{scriptPath}:/tmp/cesium-build.sh:ro\"");
+                dockerArgsBuilder.Append(" -e CC=clang");
+                dockerArgsBuilder.Append(" -e CXX=clang++");
+
+                foreach (string envVarName in new[] {
+                    "VCPKG_BINARY_SOURCES", "AWS_ACCESS_KEY_ID", "AWS_SECRET_ACCESS_KEY",
+                    "AWS_REGION", "CESIUM_VCPKG_RELEASE_ONLY" })
+                {
+                    string? value = Environment.GetEnvironmentVariable(envVarName);
+                    if (!string.IsNullOrEmpty(value))
+                        dockerArgsBuilder.Append($" -e \"{envVarName}={value}\"");
+                }
+
+                dockerArgsBuilder.Append($" {containerImage} bash /tmp/cesium-build.sh");
+                dockerInfo.Arguments = dockerArgsBuilder.ToString();
+
+                RunAndLog(dockerInfo, log, logFilename);
+            }
+            finally
+            {
+                try { File.Delete(scriptPath); } catch (Exception) { }
+            }
+        }
+
         private static void RunAndLog(ProcessStartInfo startInfo, StreamWriter log, string logFilename)
         {
             using (Process configure = new Process())

From 14699a9c5af08b862c9bfa586d9623d6b32c5384 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Fri, 24 Apr 2026 21:58:38 +1000
Subject: [PATCH 10/20] Fix problems running docker container for native linux
 build.

---
 Build~/Package.cs                            | 3 ++-
 Source/Editor/CompileCesiumForUnityNative.cs | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index efbe1f4b..a5e478cd 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -411,11 +411,12 @@ private static void RunCmakeInContainer(
             File.WriteAllText(scriptPath,
                 "#!/bin/bash\n" +
                 "set -e\n" +
+                "dnf install -q -y epel-release\n" +
                 "dnf module enable -y llvm-toolset\n" +
                 "dnf install -q -y clang cmake make nasm\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
                 $"cmake {string.Join(' ', buildArgs)}\n",
-                Encoding.UTF8);
+                new UTF8Encoding(false));
 
             try
             {
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index 986f367f..d50ed105 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -711,11 +711,12 @@ private static void RunCmakeInContainer(
             File.WriteAllText(scriptPath,
                 "#!/bin/bash\n" +
                 "set -e\n" +
+                "dnf install -q -y epel-release\n" +
                 "dnf module enable -y llvm-toolset\n" +
                 "dnf install -q -y clang cmake make nasm\n" +
                 $"cmake {configureArgs}\n" +
                 $"cmake {buildArgs}\n",
-                Encoding.UTF8);
+                new UTF8Encoding(false));
 
             try
             {

From 832924925f0b6fe874aa29fcdcc286101915ce50 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 06:43:57 +1000
Subject: [PATCH 11/20] Another attempt at installing nasm.

---
 Build~/Package.cs                            | 3 ++-
 Source/Editor/CompileCesiumForUnityNative.cs | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index a5e478cd..b278f7f3 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -411,7 +411,8 @@ private static void RunCmakeInContainer(
             File.WriteAllText(scriptPath,
                 "#!/bin/bash\n" +
                 "set -e\n" +
-                "dnf install -q -y epel-release\n" +
+                "dnf install -q -y dnf-plugins-core\n" +
+                "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
                 "dnf install -q -y clang cmake make nasm\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index d50ed105..b69d5db2 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -711,7 +711,8 @@ private static void RunCmakeInContainer(
             File.WriteAllText(scriptPath,
                 "#!/bin/bash\n" +
                 "set -e\n" +
-                "dnf install -q -y epel-release\n" +
+                "dnf install -q -y dnf-plugins-core\n" +
+                "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
                 "dnf install -q -y clang cmake make nasm\n" +
                 $"cmake {configureArgs}\n" +

From 1762cc198f9b08e809a36a845cc10eec42030bd5 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 10:21:29 +1000
Subject: [PATCH 12/20] Add git to alma container.

---
 Build~/Package.cs                            | 2 +-
 Source/Editor/CompileCesiumForUnityNative.cs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index b278f7f3..0fe0d634 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -414,7 +414,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang cmake make nasm\n" +
+                "dnf install -q -y clang cmake make nasm git\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
                 $"cmake {string.Join(' ', buildArgs)}\n",
                 new UTF8Encoding(false));
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index b69d5db2..300f4f32 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -714,7 +714,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang cmake make nasm\n" +
+                "dnf install -q -y clang cmake make nasm git\n" +
                 $"cmake {configureArgs}\n" +
                 $"cmake {buildArgs}\n",
                 new UTF8Encoding(false));

From a923c3d15bbd5ee28c7f37aa4fbf81b3d0387429 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 15:06:08 +1000
Subject: [PATCH 13/20] Install more dependencies in container.

---
 Build~/Package.cs                            | 2 +-
 Source/Editor/CompileCesiumForUnityNative.cs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index 0fe0d634..c1fa6219 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -414,7 +414,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang cmake make nasm git\n" +
+                "dnf install -q -y clang cmake make nasm git curl zip unzip tar\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
                 $"cmake {string.Join(' ', buildArgs)}\n",
                 new UTF8Encoding(false));
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index 300f4f32..304fa5cc 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -714,7 +714,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang cmake make nasm git\n" +
+                "dnf install -q -y clang cmake make nasm git curl zip unzip tar\n" +
                 $"cmake {configureArgs}\n" +
                 $"cmake {buildArgs}\n",
                 new UTF8Encoding(false));

From f7927d6cab3ec3a7607d1671cd3831cf7b0ac99d Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 16:01:59 +1000
Subject: [PATCH 14/20] Install latest 3.x version of cmake in the container.

---
 Build~/Package.cs                            | 3 ++-
 Source/Editor/CompileCesiumForUnityNative.cs | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index c1fa6219..f6bc1daf 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -414,7 +414,8 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang cmake make nasm git curl zip unzip tar\n" +
+                "dnf install -q -y clang make nasm git curl zip unzip tar\n" +
+                "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
                 $"cmake {string.Join(' ', buildArgs)}\n",
                 new UTF8Encoding(false));
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index 304fa5cc..cce0fd52 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -714,7 +714,8 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang cmake make nasm git curl zip unzip tar\n" +
+                "dnf install -q -y clang make nasm git curl zip unzip tar\n" +
+                "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
                 $"cmake {configureArgs}\n" +
                 $"cmake {buildArgs}\n",
                 new UTF8Encoding(false));

From 9d06bd56b831da7d7711595eef2437c6c3bcc408 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 16:36:50 +1000
Subject: [PATCH 15/20] Install aws so we can use vcpkg binary caching.

---
 Build~/Package.cs                            | 1 +
 Source/Editor/CompileCesiumForUnityNative.cs | 1 +
 2 files changed, 2 insertions(+)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index f6bc1daf..15614717 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -416,6 +416,7 @@ private static void RunCmakeInContainer(
                 "dnf module enable -y llvm-toolset\n" +
                 "dnf install -q -y clang make nasm git curl zip unzip tar\n" +
                 "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
+                "curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscliv2.zip && unzip -q /tmp/awscliv2.zip -d /tmp && /tmp/aws/install && rm -rf /tmp/awscliv2.zip /tmp/aws\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
                 $"cmake {string.Join(' ', buildArgs)}\n",
                 new UTF8Encoding(false));
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index cce0fd52..01d4eb4d 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -716,6 +716,7 @@ private static void RunCmakeInContainer(
                 "dnf module enable -y llvm-toolset\n" +
                 "dnf install -q -y clang make nasm git curl zip unzip tar\n" +
                 "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
+                "curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscliv2.zip && unzip -q /tmp/awscliv2.zip -d /tmp && /tmp/aws/install && rm -rf /tmp/awscliv2.zip /tmp/aws\n" +
                 $"cmake {configureArgs}\n" +
                 $"cmake {buildArgs}\n",
                 new UTF8Encoding(false));

From e43b8d5d741a287dff77b911080a982344efe7db Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 19:42:59 +1000
Subject: [PATCH 16/20] More dependencies, this time for building openssl.

---
 Build~/Package.cs                            | 2 +-
 Source/Editor/CompileCesiumForUnityNative.cs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index 15614717..61f098ee 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -414,7 +414,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang make nasm git curl zip unzip tar\n" +
+                "dnf install -q -y clang make nasm git curl zip unzip tar kernel-headers perl-IPC-Cmd\n" +
                 "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
                 "curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscliv2.zip && unzip -q /tmp/awscliv2.zip -d /tmp && /tmp/aws/install && rm -rf /tmp/awscliv2.zip /tmp/aws\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index 01d4eb4d..469b97c7 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -714,7 +714,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang make nasm git curl zip unzip tar\n" +
+                "dnf install -q -y clang make nasm git curl zip unzip tar kernel-headers perl-IPC-Cmd\n" +
                 "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
                 "curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscliv2.zip && unzip -q /tmp/awscliv2.zip -d /tmp && /tmp/aws/install && rm -rf /tmp/awscliv2.zip /tmp/aws\n" +
                 $"cmake {configureArgs}\n" +

From 45960f452d5f6f13e35e9325f1cf66b9ec3165bd Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 20:12:53 +1000
Subject: [PATCH 17/20] Might get the packages right someday...

---
 Build~/Package.cs                            | 2 +-
 Source/Editor/CompileCesiumForUnityNative.cs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Build~/Package.cs b/Build~/Package.cs
index 61f098ee..8ab7f0e2 100644
--- a/Build~/Package.cs
+++ b/Build~/Package.cs
@@ -414,7 +414,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang make nasm git curl zip unzip tar kernel-headers perl-IPC-Cmd\n" +
+                "dnf install -q -y clang make nasm git curl zip unzip tar kernel-headers perl-core ninja-build python3 pkgconfig autoconf automake libtool patch\n" +
                 "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
                 "curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscliv2.zip && unzip -q /tmp/awscliv2.zip -d /tmp && /tmp/aws/install && rm -rf /tmp/awscliv2.zip /tmp/aws\n" +
                 $"cmake {string.Join(' ', configureArgs)}\n" +
diff --git a/Source/Editor/CompileCesiumForUnityNative.cs b/Source/Editor/CompileCesiumForUnityNative.cs
index 469b97c7..85e0aaaf 100644
--- a/Source/Editor/CompileCesiumForUnityNative.cs
+++ b/Source/Editor/CompileCesiumForUnityNative.cs
@@ -714,7 +714,7 @@ private static void RunCmakeInContainer(
                 "dnf install -q -y dnf-plugins-core\n" +
                 "dnf config-manager --set-enabled powertools\n" +
                 "dnf module enable -y llvm-toolset\n" +
-                "dnf install -q -y clang make nasm git curl zip unzip tar kernel-headers perl-IPC-Cmd\n" +
+                "dnf install -q -y clang make nasm git curl zip unzip tar kernel-headers perl-core ninja-build python3 pkgconfig autoconf automake libtool patch\n" +
                 "curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.31.12/cmake-3.31.12-linux-x86_64.tar.gz | tar -xz -C /usr/local --strip-components=1\n" +
                 "curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscliv2.zip && unzip -q /tmp/awscliv2.zip -d /tmp && /tmp/aws/install && rm -rf /tmp/awscliv2.zip /tmp/aws\n" +
                 $"cmake {configureArgs}\n" +

From c5f16b7add1de75c76655df485f96794661947ad Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Sat, 25 Apr 2026 20:59:46 +1000
Subject: [PATCH 18/20] Fix compiler error.

---
 native~/src/Runtime/UnityPrepareRendererResources.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/native~/src/Runtime/UnityPrepareRendererResources.cpp b/native~/src/Runtime/UnityPrepareRendererResources.cpp
index 7efe023a..7eead7e0 100644
--- a/native~/src/Runtime/UnityPrepareRendererResources.cpp
+++ b/native~/src/Runtime/UnityPrepareRendererResources.cpp
@@ -73,6 +73,7 @@
 
 #include <algorithm>
 #include <array>
+#include <cstddef>
 #include <unordered_map>
 #include <variant>
 
@@ -151,7 +152,7 @@ template <typename TIndex> struct CopyVertexColors {
     uint8_t a;
   };
 
-  bool operator()(AccessorView<nullptr_t>&& invalidView) { return false; }
+  bool operator()(AccessorView<std::nullptr_t>&& invalidView) { return false; }
 
   template <typename TColorView> bool operator()(TColorView&& colorView) {
     if (colorView.status() != AccessorViewStatus::Valid) {

From 5e02bb55b19138e567c0475ddb598efbe8be7c61 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Mon, 27 Apr 2026 20:22:37 +1000
Subject: [PATCH 19/20] Try specifying full path to TestResults.xml file.

---
 .github/workflows/build.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7382d833..7afc42c8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -450,7 +450,7 @@ jobs:
         if: success() || failure()    # run this step even if previous step failed
         with:
           name: Tests - Linux
-          path: ~/cesium/CesiumForUnityBuildProject/TestResults.xml
+          path: /home/runner/cesium/CesiumForUnityBuildProject/TestResults.xml
           reporter: dotnet-nunit
   Emscripten:
     needs: [QuickChecks]

From 8cb868fd15b7fbd5d72a5a20df8b3736390540a6 Mon Sep 17 00:00:00 2001
From: Kevin Ring <Kevin.Ring@bentley.com>
Date: Tue, 28 Apr 2026 08:20:17 +1000
Subject: [PATCH 20/20] Update CHANGES.md.

---
 CHANGES.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CHANGES.md b/CHANGES.md
index 3e665852..5a47fa62 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Change Log {#changes}
 
+## ? - ?
+
+##### Additions :tada:
+
+- Added support for the Linux platform (x86-64 only).
+
 ## v1.23.1 - 2026-04-01
 
 This release updates [cesium-native](https://github.com/CesiumGS/cesium-native) from v0.58.0 to v0.59.0. See the [changelog](https://github.com/CesiumGS/cesium-native/blob/main/CHANGES.md) for a complete list of changes in cesium-native.