[Haskell-cafe] Re: ghci can't find Paths_ module created by cabal

Thomas Hartman tphyahoo at gmail.com
Wed Oct 21 23:31:16 EDT 2009

from my bash hints file:

thartman at ubuntu:~/haskellInstalls/gitit>thartman_ghci_with_data_files
  Loading a package with data files in ghci
    See http://neilmitchell.blogspot.com/2008/02/adding-data-files-using-cabal.html

       The above method works well after a program has been installed,
but is harder to work with while developing a program. To alleviate
these problems, we can add our own Paths module to the program, for

        module Paths_hoogle where

        getDataFileName :: FilePath -> IO FilePath
        getDataFileName = return

        Place this module alongside all the other modules. While
developing the program our hand-created Paths module will be invoked,
which says the data is always in the current directory. When doing a
Cabal build, Cabal will choose its custom generated Paths module over
ours, and we get the benefits of Cabal managing our data.

2009/10/21 Robin Green <greenrd at greenrd.org>:
> I'm trying to run cabal-install in ghci so I can run it under the ghci
> debugger. However I try it, though, I always get one of these two
> errors:
> /src/greenrd/darcs/cabal-install/Main.hs:70:17:
>    Could not find module `Paths_cabal_install':
>      Use -v to see a list of the files searched for.
> Failed, modules loaded: none.
> or
> <command line>:
>    Could not find module `Main':
>      Use -v to see a list of the files searched for.
> --
> Robin
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