====== Attempt #1
-----> Fetching repository
       Cloning into '/tmp/d20240512-7-8umw7v/input'...
-----> Setting up package repository...
-----> Starting packaging process
-----> Additional environment variables
       UUID=144.76.242.2:22/805bc575-92d3-44d0-942b-89cf71978ef5
       HOME=/home/pkgr
-----> Empty or invalid cache
-----> Fetching pkgr f8398b4d6d9e987f7ae6ff9391d69843dd81a6a3...
-----> Starting packaging process...
-----> Fetching buildpack https://github.com/mjmair/heroku-buildpack-python at v216-mjmair
-----> Running hook: "/tmp/before_hook20240512-49-8ooph.sh"
       contrib/packager.io/before.sh: line 8: APP_PKG_VERSION: unbound variable
       ! ERROR: Hook failed
Failed to package application
tar: This does not look like a tar archive
tar: Exiting with failure status due to previous errors
       ! FAILED - Build error.
       ! Please contact support.