diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c0e4d5784674..97ecd363691a 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -824,7 +824,7 @@ jobs:
           prepareSDK "-x86_64-pc-win32"      "dist-win-x86_64"    "./dist/win-x86_64/"
 
       - name: Download MSI package
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: scala.msi
           path: .
diff --git a/.github/workflows/publish-chocolatey.yml b/.github/workflows/publish-chocolatey.yml
index 88a8a7913188..4370f4876adc 100644
--- a/.github/workflows/publish-chocolatey.yml
+++ b/.github/workflows/publish-chocolatey.yml
@@ -31,7 +31,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: Fetch the Chocolatey package from GitHub
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: scala.nupkg
       - name: Publish the package to Chocolatey
diff --git a/.github/workflows/test-chocolatey.yml b/.github/workflows/test-chocolatey.yml
index e302968b9129..fc21455ec49f 100644
--- a/.github/workflows/test-chocolatey.yml
+++ b/.github/workflows/test-chocolatey.yml
@@ -35,7 +35,7 @@ jobs:
           distribution: temurin
           java-version: ${{ inputs.java-version }}
       - name: Download the 'nupkg' from GitHub Artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: scala.nupkg
           path: ${{ env.CHOCOLATEY-REPOSITORY }}
diff --git a/.github/workflows/test-msi.yml b/.github/workflows/test-msi.yml
index 1299c3d55061..b05d97a10c10 100644
--- a/.github/workflows/test-msi.yml
+++ b/.github/workflows/test-msi.yml
@@ -29,7 +29,7 @@ jobs:
           distribution: temurin
           java-version: ${{ inputs.java-version }}
       - name: Download MSI artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: scala.msi
           path: .
diff --git a/compiler/src/dotty/tools/dotc/core/SymDenotations.scala b/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
index 74a125e2a41e..b6e8dc9a2c76 100644
--- a/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
+++ b/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
@@ -1220,7 +1220,7 @@ object SymDenotations {
       || is(Inline, butNot = Deferred)
       || is(JavaDefinedVal, butNot = Method)
       || isConstructor
-      || !owner.isExtensibleClass && !is(Deferred)
+      || exists && !owner.isExtensibleClass && !is(Deferred)
       	// Deferred symbols can arise through parent refinements under x.modularity.
       	// For them, the overriding relationship reverses anyway, so
       	// being in a final class does not mean the symbol cannot be
diff --git a/tests/neg/i23637.check b/tests/neg/i23637.check
new file mode 100644
index 000000000000..d568c04a31b7
--- /dev/null
+++ b/tests/neg/i23637.check
@@ -0,0 +1,6 @@
+-- [E083] Type Error: tests/neg/i23637.scala:6:9 -----------------------------------------------------------------------
+6 |  export foo.pin.* // error: (because we need reflection to get at foo.pin)
+  |         ^^^^^^^
+  |         (Test.foo.pin : Object) is not a valid export prefix, since it is not an immutable path
+  |
+  | longer explanation available when compiling with `-explain`