diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4e6bd447..159096bf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,6 +29,7 @@ jobs:
         with:
           app-path: example-application
           toolchains: arm-zephyr-eabi
+          ccache-cache-key: ${{ matrix.os }}
 
       - name: Build firmware
         working-directory: example-application