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