Raghav Gururajan via Guix-patches via schreef op vr 30-04-2021 om 07:34 [-0400]: > + (source > + (origin > + (method url-fetch) > + (uri > + (string-append "https://github.com/nltk/nltk/" > + "archive/refs/tags/" version ".tar.gz")) > + (sha256 > + (base32 "1d2cqbc1k6qgd27vfhgd3isn7wknqsgp50vx67m29zd6wgmxq9px")))))) Is this an autogenerated tarball? It seems to be. Autogenerated tarballs should be avoided for reproducibility (see ); GitHub sometimes changes the hashes of these tarballs. Perhaps you could use git-fetch instead? I thought there was a linter checking for this, or maybe that's just wishful thinking. Greetings, Maxime