{

allowUnfree = true;


packageOverrides = super: let self = super.pkgs; in cabal-install cpphs happy ghc-paths
    aeson async base bytestring
    containers data-default deepseq Earley either exceptions
    filepath free haskell-src-meta # lens interpolatedstring-perl6
    language-python mtl parallel process QuickCheck semigroups
    split template-haskell text time transformers vinyl wai warp
    wl-pprint-text

  {

     myHaskell =
     self.haskellPackages.ghcWithPackages # ghcWithHoogle
        (haskellPackages: with haskellPackages; [

    random alex
    ]);
  };

}

/*



nix-env -iA nixpkgs.myHaskell

[Error]
collision between ‘/nix/store/9j1dmzybgmqw5725a5039yz1y31ndcj5-interpolatedstring-perl6-1.0.0/lib/ghc-8.0.1/interpolatedstring-perl6-1.0.0/libHSinterpolatedstring-perl6-1.0.0-1WpUzFA59v7FsfEEkl8LNi-ghc8.0.1.so’ and ‘/nix/store/5sblvp6shjd5ihnir34yi86vdz1pqxh2-ghc-8.0.1/lib/ghc-8.0.1/interpolatedstring-perl6-1.0.0/libHSinterpolatedstring-perl6-1.0.0-1WpUzFA59v7FsfEEkl8LNi-ghc8.0.1.so’; use ‘nix-env --set-flag priority NUMBER PKGNAME’ to change the priority of one of the conflicting packages

building path(s) ‘/nix/store/mvzpzh2yjyrkyvznidvd4v84878zi37k-user-environment’
Wide character in die at /nix/store/64jc9gd2rkbgdb4yjx3nrgc91bpjj5ky-buildenv.pl line 79.
collision between ‘/nix/store/sdp18c1nac833lcf6cl34cfa2vrwlamh-lens-4.14/lib/ghc-8.0.1/lens-4.14/Control/Exception/Lens.dyn_hi’ and ‘/nix/store/niv3qhgwdfaq3h9p9bbv65my5h8riqf0-ghc-8.0.1/lib/ghc-8.0.1/lens-4.14/Control/Exception/Lens.dyn_hi’; use ‘nix-env --set-flag priority NUMBER PKGNAME’ to change the priority of one of the conflicting packages
builder for ‘/nix/store/9jvmhvxnb9j95s47hmphdzpa64znhby6-user-environment.drv’ failed with exit code 255
error: build of ‘/nix/store/9jvmhvxnb9j95s47hmphdzpa64znhby6-user-environment.drv’ failed

building path(s) ‘/nix/store/s65zj3qw8df7m5lsnqpc6w8fk21099dr-user-environment’
Wide character in die at /nix/store/64jc9gd2rkbgdb4yjx3nrgc91bpjj5ky-buildenv.pl line 79.
collision between ‘/nix/store/x80gm9yxym6xihpnlgrrhpr8y3pvrqpf-cabal-install-1.24.0.2/bin/cabal’ and ‘/nix/store/41yzrgxjjcy8dyk69q8g8a7667ri06ym-ghc-8.0.1/bin/cabal’; use ‘nix-env --set-flag priority NUMBER PKGNAME’ to change the priority of one of the conflicting packages
builder for ‘/nix/store/ljjwbjpblghx32kndxghrnf0aadm8qji-user-environment.drv’ failed with exit code 255
error: build of ‘/nix/store/ljjwbjpblghx32kndxghrnf0aadm8qji-user-environment.drv’ failed


*/