I've run into the same problem, seems like fetching the revised cabal file would be the best bet. (In the meantime I've modified package definitions to make the metadata changes, but that is manual and certainly should be automated by import.)
bug#49418: Importing haskell packages from hackage doesn't apply metadata revisions
John Kehayias via Bug reports for GNU Guix Mon, 05 Jul 2021 08:36:11 -0700
- bug#49418: Importing haskell pa... Philip Munksgaard
- bug#49418: Importing haske... John Kehayias via Bug reports for GNU Guix
- bug#49418: Importing h... John Kehayias via Bug reports for GNU Guix
- bug#49418: Importi... Philip Munksgaard
- bug#49418: Imp... Philip Munksgaard
- bug#49418... John Kehayias via Bug reports for GNU Guix