Try one more

Author: mhucka

.github/workflows/ci_docker_tests.yaml

@@ -72,8 +72,12 @@ jobs:
 
       - name: Build Docker images
         run: |
-          docker compose build qsim-base-image
-          docker compose build qsim-cxx-tests-image qsim-py-tests-image
+          # Running locally, a plain "docker compose build" works as expected.
+          # On GitHub, buildx tries to build all 3 images in parallel even if
+          # you use env var COMPOSE_PARALLEL_LIMIT or option --parallel 1.
+          # The build then fails because the qsim-base image is not available
+          # to the other two build processes.
+          docker compose --parallel 1 build
 
       - name: Run C++ tests
         run: docker run --rm qsim-cxx-tests:latest