diff --git a/.github/workflows/build_PR.yml b/.github/workflows/build_PR.yml
index 18255ce6..0a3c509b 100644
--- a/.github/workflows/build_PR.yml
+++ b/.github/workflows/build_PR.yml
@@ -1,9 +1,17 @@
-name: build
+name: build_PR
 
 on:
   pull_request:
     branches: [ unstable ]
 
+env:
+  CMAKE_BUILD_PARALLEL_LEVEL: 2
+  CTEST_PARALLEL_LEVEL: 1
+  CTEST_OUTPUT_ON_FAILURE: 1
+  OMPI_ALLOW_RUN_AS_ROOT: 1
+  OMPI_ALLOW_RUN_AS_ROOT_CONFIRM: 1
+  OMPI_MCA_rmaps_base_oversubscribe: "yes"
+
 jobs:
   build:
 
@@ -11,23 +19,20 @@ jobs:
       fail-fast: false
 
     runs-on: ubuntu-latest
-    container: 
-      image: materialstheory/solid_dmft_ci
+    container:
+      image: ghcr.io/triqs/solid_dmft_github_ci:unstable
 
     steps:
-      - uses: actions/checkout@v2
-        with: 
-          path: 'solid_dmft.src'
+      - uses: actions/checkout@v4
 
       - name: Build solid_dmft
         run: |
-          mkdir solid_dmft.build && cd solid_dmft.build && cmake ../solid_dmft.src -DMPIEXEC_PREFLAGS='--allow-run-as-root' 
-          make
+          cmake -S . -B build/ -DBuild_Documentation=OFF
+          cmake --build build/ --verbose
 
       - name: Test solid_dmft
         run: |
-          cd solid_dmft.build
-          ctest --output-on-failure
+          cmake --build build/ --target test