Okay, so then I have so troubles regarding the compilation of my executable: First, what do you think is the simpler : (1) build only the library through cabal-install and then the executable with ghc (it isn't to be distributed with the lib), or (2) add both to my http://old.nabble.com/file/p27515830/HSFML.cabal .cabal file and build them in the same time with a 'cabal build' ? Because I've tried both methods, and have had issues with both : (1) after a 'cabal build', ghc doesn't know where to find my library -- whereas cabal-install displays 'Registering HSFL-1.5...' at the end of the build -- when I do 'ghc --make main.hs'. I'm not gonna do a 'cabal install' whenever I alter my code, am I? (2) well, then, when building, if I don't specify that my executable depends on my lib, I got: SFML/Direct/Graphics.hs:51:7: Could not find module `SFML.Direct.Types.Enums': It is a member of the hidden package `HSFML-1.5'. Perhaps you need to add `HSFML' to the build-depends in your .cabal file. it is a hidden module in the package `HSFML-1.5' Use -v to see a list of the files searched for. and if I do what I asks me to add (I add the line 'Build-Depends: HSFML' in the 'Executable' section of my .cabal file), I'm told when 'cabal build'ing: cabal: internal error: could not construct a valid install plan. The proposed (invalid) plan contained the following problems: The following packages are involved in a dependency cycle HSFML-1.5 Miguel Mitrofanov wrote:
With cabal-install, usually.
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