On 12/06/2014 05:29 PM, Carlo Nucera wrote: > Hi Peter > > I added this snippet to my ~/.nix-packages/config.nix > > ghcTestEnv = self.haskellPackages_ghc783.ghcWithPackages (p: with p; [ > mtl > ]); > > and ran: > > $ nix-env -p /tmp/haskell -iA ghcTestEnv > $ /tmp/haskell/bin/ghci > Prelude> import Control.Monad.State.Lazy > > These commands worked well. However, when adding abcnotation, it > complains rightfully that it doesn't know what we are talking about: > > error: undefined variable `abcnotation' at > /home/carlo/settings/nix-local/config.nix:34:5 > > this happens probably because I wrote the nix expression for > abcnotation, and it's not yet present in the channel. What would be > the right way to add an expression made by me in this setup? > >> Generally speaking, ghc-wrapper is fundamentally broken and many >> discerning Nix hackers gave up using it entirely a long time ago >> (precisely because of the kind of trouble that you seem to be having). > > More generally, I'd like a configuration in which I'm able to: > 1) install packages from nixos-unstable, > 2) from a nixpkgs local repo, > 3) from expressions mantained by me > 4) using ghc-mod and similar in emacs > > Regrettably, I really don't know how to set up such a thing. Before I > copied the configuration I'm using (from Fuuzetsu), I was using a > function like ghcWithPackages similar to the one you proposed, but I > was unable to integrate that with things packaged by me (and so I > switched).
I never use nix-env -i for Haskell stuff, it just does not end well. > Can you point me towards some dotFiles that obtaining what I'm > searching for with the ghcWithPackages function? > > Best regards, > Carlo My personal advice is to purge everything Haskell related from nix-env and start using nix-shell/nix-build only. Maybe you have done so already, I have not finished reading all the replies yet. > 2014-12-06 18:04 GMT+01:00 Peter Simons <[email protected]>: >> Hi Carlo, >> >> > ghc-pkg check is full of errors >> >> I don't think that "ghc-pkg check" ever succeeded in any ghc-wrapper >> based installation. >> >> > packages I installed no longer load in ghci >> >> There is no obvious explanation for the errors you've described. As >> random suggestion how you might obtain some additional insight, you >> could add >> >> ghcTestEnv = self.haskellPackages_ghc783.ghcWithPackages (p: with p; [ >> mtl >> ]); >> >> to your ~/.nix-pkgs/config.nix and then run: >> >> $ nix-env -p /tmp/haskell -iA ghcTestEnv >> $ /tmp/haskell/ghci >> Prelude> import Control.Monad.State.Lazy >> >> Does that succeed? If it does, you try adding 'abcnotation', too, to see >> whether that makes a difference. >> >> Generally speaking, ghc-wrapper is fundamentally broken and many >> discerning Nix hackers gave up using it entirely a long time ago >> (precisely because of the kind of trouble that you seem to be having). >> >> Best regards, >> Peter >> >> _______________________________________________ >> nix-dev mailing list >> [email protected] >> http://lists.science.uu.nl/mailman/listinfo/nix-dev > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev > -- Mateusz K. _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
