diff --git a/.github/workflows/build-site.yml b/.github/workflows/build-site.yml
index e6c85e2..a85d965 100644
--- a/.github/workflows/build-site.yml
+++ b/.github/workflows/build-site.yml
@@ -28,6 +28,7 @@ jobs:
           npm config set "//npm.fontawesome.com/:_authToken" ${{ secrets.FONTAWESOME_TOKEN }}
       - name: Install global npm packages
         run: |
+          npm install postcss@^8.4.6 postcss-cli@^9.1.0 @fullhuman/postcss-purgecss@^2.0.3
           npm -g install postcss@^8.4.6 postcss-cli@^9.1.0 @fullhuman/postcss-purgecss@^2.0.3
       - name: Install local npm packages
         run: |