diff --git a/.github/workflows/publishing.yml b/.github/workflows/publishing.yml
index ad6ba83..b4390a6 100644
--- a/.github/workflows/publishing.yml
+++ b/.github/workflows/publishing.yml
@@ -38,9 +38,9 @@ jobs:
           path: |
             ~/Library/Caches/org.swift.swiftpm
             ~/Library/Developer/Xcode/DerivedData/**/SourcePackages/checkouts
-          key: ${{ runner.os }}-spm-${{ hashFiles('**/Package.resolved') }}
+          key: ${{ runner.os }}-${{ matrix.platform }}-spm-${{ hashFiles('**/Package.resolved') }}
           restore-keys: |
-            ${{ runner.os }}-spm-
+            ${{ runner.os }}-${{ matrix.platform }}-spm-
 
       - name: Set up signing certificate
         env: