Hi Ross, I'm experiencing the following problem. I'm trying to use a 'configure' script which is not a 'sh' script, but Cabal assumes that all 'configure' scripts are 'sh' scripts regardless of what '#!' line they start with. Isaac says this is your doing. What is the reason for it? The lines are in cabal/Distribution/Simple.hs: where defaultPostConf :: Args -> ConfigFlags -> LocalBuildInfo -> IO ExitCode defaultPostConf args flags lbi = do let prefix_opt pref opts = ("--prefix=" ++ pref) : opts confExists <- doesFileExist "configure" if confExists then do rawSystemVerbose (configVerbose flags) "sh" ("configure" : maybe id prefix_opt (configPrefix flags) args) return () else no_extra_flags args return ExitSuccess Note that if a file doesn't have any '#!' line at all then (at least on my system) it is executed with /bin/sh. So when you run something explicitly with /bin/sh, you are ONLY affecting things which explicitly ask to be run with something other than /bin/sh. Isaac refuses to let me fix this until you speak up because he's afraid it might break the fptools build, so, ... Frederik -- http://ofb.net/~frederik/