Run of scrub-obsolete for haskell-lambdabot-haskell-plugins

Try this locally (using the package):

debcheckout haskell-lambdabot-haskell-plugins
cd haskell-lambdabot-haskell-plugins
DEB_UPDATE_CHANGELOG=auto scrub-obsolete
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[2021-07-15 17:41:11] Running ['scrub-obsolete']
[2021-07-15 17:41:11] Opening branch at https://salsa.debian.org/haskell-team/DHG_packages.git/,branch=master
[2021-07-15 17:41:12] Cached branch URL https://janitor.debian.net/git/haskell-lambdabot-haskell-plugins,branch=debian%2Flatest missing: Branch does not exist: Not a branch: "https://janitor.debian.net/git/haskell-lambdabot-haskell-plugins/": location is a repository.
[2021-07-15 17:41:16] 9/4974)
[2021-07-15 17:41:16] (3283/4974)
[2021-07-15 17:41:16] (4974/4974), done.
[2021-07-15 17:41:17] Total 294877 (delta 2554), reused 4907 (delta 2506), pack-reused 289903
[2021-07-15 17:45:01] Workspace ready - starting.
[2021-07-15 17:45:03] assuming changelog needs to be updated since gbp dch only suppors a debian directory in the root of the repository
/bin/sh: 1: scrub-obsolete: not found

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