diff --git a/.github/workflows/cross-ci.yml b/.github/workflows/cross-ci.yml
index 0afe339c..e4a2c2dc 100644
--- a/.github/workflows/cross-ci.yml
+++ b/.github/workflows/cross-ci.yml
@@ -87,6 +87,7 @@ jobs:
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.job.target }}
           use-cross: ${{ matrix.job.use-cross }}
+          project-cache-key: "rustic_core"
 
   result:
     name: Result (Cross-CI)