slackbuilds_ponce/haskell/haskell-setenv

A cross-platform library for setting environment variables. Note:
Since base-4.7.0.0 the functions setEnv and unsetEnv are provided by
System.Environment. System.SetEnv merily re-exports those functions
when built with base >= 4.7.

After uninstalling, run this command to unregister the package from
the ghc package database:   ghc-pkg recache