pakcs is broken on nixos-unstable

[ghost]

Issue description

Updating to new version of package fixed the build. Here is PR #43971

[ 5 of 38] Compiling Curry.Base.Monad ( src/Curry/Base/Monad.hs, dist/build/Curry/Base/Mon
ad.o )

src/Curry/Base/Monad.hs:20:1: error:
    Could not find module ‘Control.Monad.Trans.Either’
    Perhaps you meant
      Control.Monad.Trans (from mtl-2.2.2)
      Control.Monad.Writer (from mtl-2.2.2)
    Use -v to see a list of the files searched for.
   |
20 | import Control.Monad.Trans.Either (EitherT, left, right, runEitherT, mapEitherT)
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Steps to reproduce

Technical details

Please run nix-shell -p nix-info --run "nix-info -m" and paste the
results.