====== Attempt #1
-----> Fetching repository
       Cloning into '/tmp/d20240512-7-wclreh/input'...
-----> Setting up package repository...
-----> Starting packaging process
-----> Additional environment variables
       UUID=144.76.242.2:22/6049cfc4-3754-4fd1-a0dd-7c5274d587dc
       HOME=/home/pkgr
-----> Empty or invalid cache
-----> Fetching pkgr f8398b4d6d9e987f7ae6ff9391d69843dd81a6a3...
-----> Starting packaging process...
       Calling `DidYouMean::SPELL_CHECKERS.merge!(error_name => spell_checker)' has been deprecated. Please call `DidYouMean.correct_error(error_name, spell_checker)' instead.
-----> Fetching buildpack https://github.com/mjmair/heroku-buildpack-python at v216-mjmair
-----> Running hook: "/tmp/before_hook20240512-57-1g2vzv.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.