Try using an another shell.

.github/actions/pandemonium-build-win-x86/action.yml

@@ -27,13 +27,12 @@ runs:
   using: "composite"
   steps:
     - name: Scons Build
-      shell: cmd
+      shell: pwsh
       env:
           SCONSFLAGS: ${{ inputs.sconsflags }}
           SCONS_CACHE: ${{ inputs.scons-cache }}
           SCONS_CACHE_LIMIT: ${{ inputs.scons-cache-limit }}
       run: |
-        call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\vcvarsall.bat" x86
         echo "Building with flags:" ${{ env.SCONSFLAGS }}
         scons p=${{ inputs.platform }} target=${{ inputs.target }} tools=${{ inputs.tools }} tests=${{ inputs.tests }} --jobs=2 ${{ env.SCONSFLAGS }}
-        dir /a bin/
+        ls -l bin/

.github/workflows/windows_x86_builds.yml

@@ -45,6 +45,11 @@ jobs:
       - name: Setup python and scons
         uses: ./.github/actions/pandemonium-deps
 
+      - name: Set up Visual Studio shell
+        uses: egor-tensin/vs-shell@v2
+        with:
+          arch: x86
+
       - name: Compilation
         uses: ./.github/actions/pandemonium-build
         with: