try building

.github/workflows/build.yml

@@ -0,0 +1,65 @@
+on: 
+  push:
+    branches: [main]
+    tags: 
+      - 'v*'
+
+name: build
+jobs:
+  build:
+    name: Build Koka
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest] #, macOS-latest]
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: haskell-actions/setup@v2
+        with:
+          enable-stack: true
+          stack-version: 'latest'
+      - run: |
+          stack config set system-ghc --global true
+          stack config set install-ghc --global false
+      
+      - name: List dependencies
+        run: stack ls dependencies json | jq > stack-deps.json
+
+      - name: Restore cached dependency of Pantry (Stackage package index)
+        uses: actions/cache/restore@v4
+        id: pantry
+        env:
+          key: ghc-${{ steps.setup.outputs.ghc-version }}-stack-${{ steps.setup.outputs.stack-version }}
+        with:
+          path: ${{ steps.setup.outputs.stack-root }}/pantry
+          key: all-plan-${{ hashFiles('stack-deps.json') }}
+          restore-keys: all
+
+      - name: Recompute Stackage package index (~/.stack/pantry)
+        if: steps.pantry.outputs.cache-hit != 'true'
+        run: stack update
+
+      - name: Stack lock check
+        run: stack build --dry-run --lock-file=error-on-write
+
+      - name: Build
+        run: stack build
+
+      - name: Run Koka Packaging
+        run: |
+          stack exec koka -- -e -O2 util/bundle
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            bundle/*.tar.gz
+
+      - name: Save cached dependencies of Pantry
+        uses: actions/cache/save@v4
+        if: steps.pantry.outputs.cache-hit != 'true'
+        with:
+          path: ${{ steps.setup.outputs.stack-root }}/pantry
+          key: ${{ steps.pantry.outputs.cache-primary-key }}
+          make_latest: true