shell.nix

{ nixpkgs ? import <nixpkgs> {}, compiler ? "default" }:

let

  inherit (nixpkgs) pkgs;

  f = { mkDerivation, ad, aeson, base, bytestring, containers
      , deepseq, filepath, process, random, raw-strings-qq, split, stdenv
      , tasty, tasty-expected-failure, tasty-golden, tasty-hunit
      , temporary, python3, python3Packages.matplotlib
      }:
      mkDerivation {
        pname = "matplotlib";
        version = "0.6.0";
        src = ./.;
        libraryHaskellDepends = [
          aeson base bytestring containers deepseq filepath process split
          temporary python3 python3Packages.matplotlib
        ];
        testHaskellDepends = [
          ad base bytestring process random raw-strings-qq split tasty
          tasty-expected-failure tasty-golden tasty-hunit temporary
        ];
        homepage = "https://github.com/abarbu/matplotlib-haskell";
        description = "Bindings to Matplotlib; a Python plotting library";
        license = stdenv.lib.licenses.bsd3;
      };

  haskellPackages = if compiler == "default"
                       then pkgs.haskellPackages
                       else pkgs.haskell.packages.${compiler};

  drv = haskellPackages.callPackage f {};

in

  if pkgs.lib.inNixShell then drv.env else drv