Version 0.20.0.0-1 of haskell-hmatrix is marked for autoremoval from testing on Wed 31 Aug 2022. It is affected by #1015252. The removal of haskell-hmatrix will also cause the removal of (transitive) reverse dependency: haskell-hmatrix-gsl. You should try to prevent the removal by fixing these RC bugs.
Migration status for haskell-hmatrix (0.20.0.0-1 to 0.20.2-1): BLOCKED: Cannot migrate due to another item, which is blocked (please check which dependencies are stuck)