default.nix

{ nixpkgs ? import <nixpkgs> {}, compiler ? null }:
let pkgs = nixpkgs.pkgs;
    baseHaskellPackages = if compiler != null
                            then pkgs.haskell.packages.${compiler}
                            else pkgs.haskellPackages;
    haskellPackages = baseHaskellPackages.override {
      overrides = self: super: with pkgs.haskell.lib; {
        idiii = dontCheck super.idiii;
      };
    };
in haskellPackages.callPackage ./transcoder.nix { }