diff --git a/.github/actions/deploy-to-github-pages/action.yml b/.github/actions/deploy-to-github-pages/action.yml
index 8b3948c85b..1713f45990 100644
--- a/.github/actions/deploy-to-github-pages/action.yml
+++ b/.github/actions/deploy-to-github-pages/action.yml
@@ -117,7 +117,7 @@ runs:
         # When running in forks, do detect when links try to break out of the
         # `/git-scm.com/` subdirectory
         echo "remap-dotdot=$(echo "$base_url" |
-          sed 's|^\(.*\)\(/git-scm\.com\)$|--remap '\''(\1.*) file://../$1'\''|')" \
+          sed -n 's|^\(https\?:\/\/.*\)\(/git-scm\.com\)$|--remap '\''(\1.*) file://../$1'\''|p')" \
           >>$GITHUB_OUTPUT
 
     - name: check for broken links