diff --git a/.github/workflows/build-template.yml b/.github/workflows/build-template.yml
index d398068738..79a5465250 100644
--- a/.github/workflows/build-template.yml
+++ b/.github/workflows/build-template.yml
@@ -116,10 +116,10 @@ jobs:
             build/stage1/**/*.ir
             build/stage1/**/*.c
             build/stage1/**/*.c.o*' || '' }}
-          key: ${{ matrix.name }}-build-v3-${{ github.sha }}
+          key: ${{ matrix.name }}-build-v4-${{ github.sha }}
           # fall back to (latest) previous cache
           restore-keys: |
-            ${{ matrix.name }}-build-v3
+            ${{ matrix.name }}-build-v4
       # open nix-shell once for initial setup
       - name: Setup
         run: |
diff --git a/.github/workflows/update-stage0.yml b/.github/workflows/update-stage0.yml
index 561cb0f7ce..4fa1467739 100644
--- a/.github/workflows/update-stage0.yml
+++ b/.github/workflows/update-stage0.yml
@@ -69,10 +69,10 @@ jobs:
           build/stage1/**/*.ir
           build/stage1/**/*.c
           build/stage1/**/*.c.o*
-        key: Linux Lake-build-v3-${{ github.sha }}
+        key: Linux Lake-build-v4-${{ github.sha }}
         # fall back to (latest) previous cache
         restore-keys: |
-          Linux Lake-build-v3
+          Linux Lake-build-v4
     - if: env.should_update_stage0 == 'yes'
       # sync options with `Linux Lake` to ensure cache reuse
       run: |