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There is an outstanding proposal for a System.Process library:

http://www.haskell.org/~simonmar/System.Process.html

This is currently stalled because we need a non-blocking implementation of getProcessStatus (which is in the pipeline). Something akin to Tomasz's launch could also be included here.

How is it different from System.Posix.Process? Supposed to be more portable? Sounds good.

Yes, it is a portable process library. Cheers, Simon