misleading error message from cabal when versions differ
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Using cabal, I do './Setup.hs configure', './Setup.hs build', and 'sudo ./Setup.hs install'. Unfortunately, root's $PATH pointed to a different GHC (6.7 at some point, and not 6.4.2 which I was using), which resulted in the error message:
Setup.hs: error reading ./.setup-config; run "setup configure" command?
Of course, there was nothing wrong with .setup-config, so I spent some time investigating permissions, before int-e suggested that the search path was at fault.