diff --git a/.github/workflows/unix_impl.yml b/.github/actions/unix_impl/action.yml
similarity index 94%
rename from .github/workflows/unix_impl.yml
rename to .github/actions/unix_impl/action.yml
index d0ab680..e201382 100644
--- a/.github/workflows/unix_impl.yml
+++ b/.github/actions/unix_impl/action.yml
@@ -1,9 +1,7 @@
 name: "Common steps for Linux and OSX"
 runs:
+  using: "composite"
   steps:
-    - name: Checkout code
-      uses: actions/checkout@v3
-
     - name: Set conda environment
       uses: mamba-org/setup-micromamba@v2
       with:
@@ -23,10 +21,12 @@ runs:
         else
             micromamba install xtensor-r==0.14.0 -c conda-forge;
         fi
+      shell: bash -e -l {0}
 
     - name: Build Xtensor.R package
       run: |
         R CMD build ${{ github.workspace }};
+      shell: bash -e -l {0}
 
     - name: Check R package
       run: |
@@ -47,3 +47,4 @@ runs:
              cat xtensor.Rcheck/Rdlatex.log
             );
         fi
+      shell: bash -e -l {0}
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 7f31946..cb36f8f 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -26,7 +26,7 @@ jobs:
         - {compiler: gcc, version: '12', novendor: 1}
         - {compiler: gcc, version: '13', novendor: 1}
         - {compiler: gcc, version: '14', novendor: 1}
-        #- {compiler: clang, version: '19'}
+        - {compiler: clang, version: '19'}
         - {compiler: clang, version: '20'}
 
     steps:
@@ -52,6 +52,9 @@ jobs:
         sudo update-alternatives --set clang++ /usr/bin/clang++-${{matrix.sys.version}}
         sudo update-alternatives --set clang-scan-deps /usr/bin/clang-scan-deps-${{matrix.sys.version}}
 
+    - name: Checkout code
+      uses: actions/checkout@v4
+
     - name: Build and run tests
-      uses: ./.github/workflows/unix_impl.yml
+      uses: ./.github/actions/unix_impl
 
diff --git a/.github/workflows/osx.yml b/.github/workflows/osx.yml
index f066647..06d5445 100644
--- a/.github/workflows/osx.yml
+++ b/.github/workflows/osx.yml
@@ -23,6 +23,9 @@ jobs:
 
     steps:
 
+    - name: Checkout code
+      uses: actions/checkout@v4
+
     - name: Build and run tests
-      uses: ./.github/workflows/unix_impl.yml
+      uses: ./.github/actions/unix_impl