diff --git a/.github/workflows/desktop-build.yml b/.github/workflows/desktop-build.yml
index f64c3895f..a26e82ee5 100644
--- a/.github/workflows/desktop-build.yml
+++ b/.github/workflows/desktop-build.yml
@@ -344,6 +344,9 @@ jobs:
     runs-on: ${{matrix.runner}}
     env:
       CCACHE_DIR: ${{github.workspace}}/.cache/
+      # Cache size over the entire repo is 10Gi:
+      # https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#usage-limits-and-eviction-policy
+      CCACHE_SIZE: 500M
 
     steps:
       - name: Checkout