diff --git a/.github/workflows/continuous.yml b/.github/workflows/continuous.yml
index ac6cd57..db2e5e2 100644
--- a/.github/workflows/continuous.yml
+++ b/.github/workflows/continuous.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Dependencies (Linux)
         if: runner.os == 'Linux'
         run: |
-          sudo apt-get install ccache
+          sudo apt-get install -y ccache
           echo 'CACHE_PATH=~/.cache/ccache' >> "$GITHUB_ENV"
 
       - name: Dependencies (macOS)
@@ -107,19 +107,24 @@ jobs:
       - name: Tests
         run: cd build; ctest --verbose -j ${{ steps.cpu-cores.outputs.count }}
 
-  build_cuda: # no runtime support for CUDA, so only build on Linux
-    name: ${{ matrix.name }} CUDA (${{ matrix.config }})
+  build_cuda:
+    name: ${{ matrix.name }} CUDA (${{ matrix.config }}) - CUDA ${{ matrix.cuda }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        config:
-          - Debug
-          # - Release # cannot run multiple cuda-toolkit jobs in parallel
+        config: [Debug, Release]
+        cuda: ['12.5.0', '11.8.0']
         include:
           - os: ubuntu-latest
             name: Linux
+            config: Debug
+            cuda: '12.5.0'
+          - os: ubuntu-latest
+            name: Linux
+            config: Release
+            cuda: '11.8.0'
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4.0.0
@@ -129,13 +134,13 @@ jobs:
       - name: Dependencies (Linux)
         if: runner.os == 'Linux'
         run: |
-          sudo apt-get install ccache
+          sudo apt-get install -y ccache
           echo 'CACHE_PATH=~/.cache/ccache' >> "$GITHUB_ENV"
 
       - uses: Jimver/cuda-toolkit@v0.2.17
         id: cuda-toolkit
         with:
-          cuda: '12.4.0'
+          cuda: ${{ matrix.cuda }}
           sub-packages: '["nvcc"]'
           method: 'network'
 
@@ -148,7 +153,7 @@ jobs:
         uses: actions/cache@v4.0.2
         with:
           path: ${{ env.CACHE_PATH }}
-          key: ${{ runner.os }}-${{ matrix.config }}-CUDA-cache
+          key: ${{ runner.os }}-${{ matrix.config }}-CUDA-${{ matrix.cuda }}-cache
 
       - name: Prepare ccache
         run: |