ghc-parmake

ghc-parmake is a parallel wrapper for 'ghc --make' intended to work as its drop-in replacement. It can build your Haskell program in parallel using multiple cores. ghc-parmake works by extracting a module dependency graph with 'ghc -M' and then running multiple 'ghc -c' processes in parallel. To set the number of concurrent jobs, use the -j option.