diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d64e7cb10..6c12d88ed 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,7 +57,7 @@ jobs:
           path: |
             app/.cxx
             app/src/main/cpp/nettle/nettle
-          key: ${{ runner.os }}-cmake-${{ github.run_id }}
+          key: ${{ runner.os }}-cmake-${{ hashFiles('app/src/main/cpp/CMakeLists.txt') }}
           restore-keys: ${{ runner.os }}-cmake-
 
       - name: Build OSS
diff --git a/.github/workflows/releases.yml b/.github/workflows/releases.yml
index daaae3951..81d223d3d 100644
--- a/.github/workflows/releases.yml
+++ b/.github/workflows/releases.yml
@@ -35,7 +35,7 @@ jobs:
           path: |
             app/.cxx
             app/src/main/cpp/nettle/nettle
-          key: ${{ runner.os }}-cmake-${{ github.run_id }}
+          key: ${{ runner.os }}-cmake-${{ hashFiles('app/src/main/cpp/CMakeLists.txt') }}
           restore-keys: ${{ runner.os }}-cmake-
 
       - name: Gradle Build