diff --git a/.github/workflows/debug_build.yml b/.github/workflows/debug_build.yml
index d22876ac..2e818293 100644
--- a/.github/workflows/debug_build.yml
+++ b/.github/workflows/debug_build.yml
@@ -21,6 +21,11 @@ jobs:
           exit_on_error() { echo "$1"; exit 1; }
 
           echo "Setting vars"
+
+          if [ "$GITHUB_EVENT_NAME" == "pull_request" ]; then
+              GITHUB_SHA="${{ github.event.pull_request.head.sha }}" # Do not use last merge commit set in GITHUB_SHA
+          fi
+
           # Set RELEASE_VERSION_NAME to "<CURRENT_VERSION_NAME>+<last_commit_hash>"
           CURRENT_VERSION_NAME_REGEX='\s+versionName "([^"]+)"$'
           CURRENT_VERSION_NAME="$(grep -m 1 -E "$CURRENT_VERSION_NAME_REGEX" ./app/build.gradle | sed -r "s/$CURRENT_VERSION_NAME_REGEX/\1/")"