[darcs-devel] [issue941] Checking for modules provided by packages fails with multiple providers

[Duncan]

New submission from Duncan <duncan at haskell.org>:

checking for module Control.Monad.Error... no; and neither in package mtl
configure: error: Cannot find Control.Monad.Error; try installing package mtl?

mtl is installed and of course it provides Control.Monad.Error. However I also
have mtl-tf installed and it  provides Control.Monad.Error too. This trips up
the configure test. (unregistering mtl-tf makes the test go through)

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messages: 5158
nosy: beschmi, dagit, duncan, tommy
priority: bug
status: unread
title: Checking for modules provided by packages fails with multiple providers

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