diff --git a/action.yml b/action.yml
index 9281570..8cedd8d 100644
--- a/action.yml
+++ b/action.yml
@@ -44,7 +44,7 @@ runs:
       shell: bash
       run: |
         # Check if running inside of the action repo
-        if [[ -z "${{ github.action_ref }}" ]]; then if [[ "${{ github.ref_name }}" =~ (.*)/merge ]]; then tag=${BASH_REMATCH[1]}; else tag=${{ github.ref_name }}; fi; fi
+        if [[ -z "${{ github.action_ref }}" ]]; then if [[ "${{ github.ref_name }}" =~ (.*)/merge ]]; then tag=pr-${BASH_REMATCH[1]}; else tag=${{ github.ref_name }}; fi; fi
         if [[ -z "${tag}" ]]; then tag=${{ github.action_ref }}; fi
         docker run --privileged --volume .:/github/workspace/ ghcr.io/jasonn3/build-container-installer:${tag} \
           ARCH=${{ inputs.arch }} \