diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7f1a931a..6d8ba190 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -180,6 +180,25 @@ jobs:
 
     # ----------------------------------------------------------------
 
+    - name: Clone randomgen
+      uses: actions/checkout@v3
+      with:
+        repository: Rconybea/randomgen
+        path: repo/randomgen
+
+    - name: Configure randomgen
+      # configure cmake for randomgen in dedicated build directory.
+      run: cmake -B ${{github.workspace}}/build_randomgen -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/local -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/randomgen
+
+    - name: Build randomgen
+      run: cmake --build ${{github.workspace}}/build_randomgen --config ${{env.BUILD_TYPE}}
+
+    - name: Install randomgen
+      # install into ${{github.workspace}}/local
+      run: cmake --install ${{github.workspace}}/build_randomgen
+
+    # ----------------------------------------------------------------
+
     - name: Clone reactor
       uses: actions/checkout@v3
       with: