diff --git a/.github/workflows/ci-build-site.yml b/.github/workflows/ci-build-site.yml
index 6e4b9402..ddbbc380 100644
--- a/.github/workflows/ci-build-site.yml
+++ b/.github/workflows/ci-build-site.yml
@@ -82,6 +82,8 @@ jobs:
           
           # Copy the generated manifest.json from the old build
           cp ${{ steps.set-dirs.outputs.old_dir }}/hugo/data/manifest.json ${{ steps.set-dirs.outputs.old_dir }}/manifest.json
+          # chown everything to the calling user as otherwise it's not possible to change it with sed and prettier later
+          sudo chown -R $USER:$USER ${{ steps.set-dirs.outputs.old_dir }}/public
 
       - name: Build current version
         run: |
@@ -102,18 +104,19 @@ jobs:
           
           # Copy the generated manifest.json from the new build
           cp ${{ steps.set-dirs.outputs.new_dir }}/hugo/data/manifest.json ${{ steps.set-dirs.outputs.new_dir }}/manifest.json
+          # chown everything to the calling user as otherwise it's not possible to change it with sed and prettier later
+          sudo chown -R $USER:$USER ${{ steps.set-dirs.outputs.new_dir }}/public
+
 
       - name: Install Prettier
         run: npm install -g prettier
 
       - name: Prettify CSS and JS in public directories
         run: |
-          # store in a variable because with sudo $PATH is different
-          prettier_cmd=$(which prettier)
-          sudo $prettier_cmd --write "${{ steps.set-dirs.outputs.old_dir }}/public/**/*.css"
-          sudo $prettier_cmd --write "${{ steps.set-dirs.outputs.old_dir }}/public/**/*.js"
-          sudo $prettier_cmd --write "${{ steps.set-dirs.outputs.new_dir }}/public/**/*.css"
-          sudo $prettier_cmd --write "${{ steps.set-dirs.outputs.new_dir }}/public/**/*.js"
+          prettier --write "${{ steps.set-dirs.outputs.old_dir }}/public/**/*.css"
+          prettier --write "${{ steps.set-dirs.outputs.old_dir }}/public/**/*.js"
+          prettier --write "${{ steps.set-dirs.outputs.new_dir }}/public/**/*.css"
+          prettier --write "${{ steps.set-dirs.outputs.new_dir }}/public/**/*.js"
 
       - name: Remove itunes:subtitle from RSS feeds before comparison
         run: |