diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 6607cee30..d0ca33116 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -29,7 +29,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: vendor/nimbus-build-system/vendor/Nim/bin
-          key: ${{ runner.os }}-${{ matrix.env.NPROC }}-nim-${{ hashFiles('.gitmodules') }}
+          key: ${{ runner.os }}-2-nim-${{ hashFiles('.gitmodules') }}
 
       - name: Install dependencies
         run: |