Fixed: chroot-installation_buster_install_haskell_upgrade_to_sid/30

[jenkins at jenkins.debian.net]

See https://jenkins.debian.net/job/chroot-installation_buster_install_haskell_upgrade_to_sid/30//console or just https://jenkins.debian.net/job/chroot-installation_buster_install_haskell_upgrade_to_sid/30/ for more information.