fix

Signed-off-by: Joe Isaacs <joe.isaacs@live.co.uk>

Author: joseph-isaacs

.github/actions/setup-prebuild/action.yml

@@ -1,15 +1,49 @@
 name: "Setup Prebuild"
-description: "Minimal setup for runners with pre-built Rust toolchain, nextest, and sccache"
+description: "Fast CI setup — uses pre-installed tools on prebuild AMIs, falls back to full setup-rust otherwise"
+
+inputs:
+  repo-token:
+    description: "GitHub token for accessing the repository (typically secrets.GITHUB_TOKEN)"
+    required: false
+    default: "${{ github.token }}"
+  toolchain:
+    description: "optional override for the toolchain version (e.g. nightly)"
+    required: false
+  components:
+    description: "optional override for the components to install for the step (e.g. clippy, rustfmt, miri)"
+    default: "clippy, rustfmt"
+    required: false
+  targets:
+    description: "optional targets override (e.g. wasm32-unknown-unknown)"
+    required: false
+  enable-sccache:
+    description: "Should sccache be enabled, true by default."
+    required: false
+    default: "true"
 
 runs:
   using: "composite"
   steps:
+    # --- Prebuild path: tools already installed, just configure sccache ---
     - name: Configure sccache timeout
+      if: github.repository == 'vortex-data/vortex' && inputs.enable-sccache == 'true'
       shell: bash
       run: |
         mkdir -p ~/.config/sccache
         echo 'server_startup_timeout_ms = 15000' > ~/.config/sccache/config
 
     - name: Pre-start sccache server
+      if: github.repository == 'vortex-data/vortex' && inputs.enable-sccache == 'true'
       shell: bash
       run: sccache --start-server &
+
+    # --- Fallback path: full setup for forks ---
+    - name: Full Rust setup
+      if: github.repository != 'vortex-data/vortex'
+      uses: ./.github/actions/setup-rust
+      with:
+        repo-token: ${{ inputs.repo-token }}
+        toolchain: ${{ inputs.toolchain }}
+        components: ${{ inputs.components }}
+        targets: ${{ inputs.targets }}
+        enable-sccache: ${{ inputs.enable-sccache }}

.github/workflows/ci.yml

@@ -441,7 +441,9 @@ jobs:
           cache-tools: true
       - uses: ./.github/actions/setup-prebuild
       - name: Install nightly for sanitizer
-        run: rustup toolchain install $NIGHTLY_TOOLCHAIN --component rust-src rustfmt clippy llvm-tools-preview
+        run: |
+          rustup toolchain install $NIGHTLY_TOOLCHAIN
+          rustup component add --toolchain $NIGHTLY_TOOLCHAIN rust-src rustfmt clippy llvm-tools-preview
       - name: Install nextest
         uses: taiki-e/install-action@v2
         with: