does that still work

.github/workflows/build.yml

@@ -1,5 +1,10 @@
 name: build
 on:
+  workflow_call:
+    inputs:
+      subdirectory:
+        required: false
+        type: string
   push:
     branches: [main, master]
   pull_request:
@@ -15,6 +20,9 @@ concurrency:
 jobs:
   build:
     name: GHC ${{ matrix.ghc-version }} on ${{ matrix.os }}
+    defaults:
+      run:
+        working-directory: ${{ github.workspace }}/${{ inputs.subdirectory }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -70,7 +78,7 @@ jobs:
         run: cabal build all
 
       - name: Run tests
-        if: ${{ matrix.os }} == 'ubuntu-latest'
+#        if: ${{ matrix.os }} == 'ubuntu-latest'
         run: cabal test all
       - uses: actions/upload-artifact@v4
         with: