diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c2f8658..101a3ff 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -50,7 +50,7 @@ jobs:
 
       - name: Create credentials
         run: |
-          mkdir ~/.gem
+          mkdir -p ~/.gem
           cat << EOF > ~/.gem/credentials
           ---
           :rubygems_api_key: ${{ secrets.RUBYGEMS_TOKEN }}