build parser in separate step

.github/workflows/ci.yaml

@@ -122,6 +122,18 @@ jobs:
           EDIT_KEY: edit
         uses: docker://demostf/api-test
 
+  build-parser:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v26
+      - uses: icewind1991/attic-action@v1
+        with:
+          name: ci
+          instance: https://cache.icewind.me
+          authToken: '${{ secrets.ATTIC_TOKEN }}'
+      - run: nix build .#demostf-parser
+
   build:
     runs-on: ubuntu-latest
     steps:
@@ -136,7 +148,7 @@ jobs:
 
   docker:
     runs-on: ubuntu-latest
-    needs: [build, api, phpunit]
+    needs: [build, build-parser, api, phpunit]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4