slackbuilds/haskell/haskell-mmap/README

This library provides a wrapper to mmap(2) or MapViewOfFile,
allowing files or devices to be lazily loaded into memory as strict
or lazy ByteStrings, ForeignPtrs or plain Ptrs, using the virtual
memory subsystem to do on-demand loading. Modifications are also
supported.

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