Try without unshare.

Author: tecarter94

deploy/tasks/buildah-oci-ta.yaml

@@ -537,7 +537,7 @@ spec:
           cat /app/build-script.sh
           chmod +x /app/build-script.sh
 
-          ./app/build-script.sh
+          /app/build-script.sh
 
           set +e
           kill $server_pid