====== Attempt #1
-----> Fetching repository
       Cloning into '/tmp/d20191030-6-1659gu3/input'...
-----> Setting up package repository...
-----> Starting packaging process
-----> Additional environment variables
       UUID=f0b4e3d2-cec0-44a8-aff4-2ccc9ef53ae7
       HOME=/home/pkgr
-----> Empty or invalid cache
-----> Fetching pkgr 000dd9ba749034a8417dda8ca461c471ad93d92d...
-----> Starting packaging process...
       ! ERROR: No such file or directory @ rb_sysopen - /usr/local/lib/ruby/gems/2.4.0/gems/pkgr-1.7.1/data/buildpacks/debian-10
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.