diff --git a/action.yml b/action.yml
index 04f3923..a68ea9d 100644
--- a/action.yml
+++ b/action.yml
@@ -77,6 +77,7 @@ runs:
     - name: Maximize build disk space
       shell: bash
       run: |
+          ! mountpoint -q /mnt && exit 0
           set -euo pipefail
 
           BUILD_MOUNT_PATH="${{ inputs.build-mount-path }}"
@@ -126,7 +127,7 @@ runs:
             sudo rm -rf /usr/local/lib/android
           fi
           if [[ ${{ inputs.remove-haskell }} == 'true' ]]; then
-            sudo rm -rf /opt/ghc
+            sudo rm -rf /usr/local/.ghcup
           fi
           if [[ ${{ inputs.remove-codeql }} == 'true' ]]; then
             sudo rm -rf /opt/hostedtoolcache/CodeQL