default.nix

{ mkDerivation, base, doctest, doctest-prop, mtl, process, python, random
, safe, stdenv, strict, syb, vector
}:
mkDerivation {
  pname = "cmaes";
  version = "0.2.2";
  src = ./.;
  enableSeparateDataOutput = true;
  libraryHaskellDepends = [ base mtl process safe strict syb ];
  testHaskellDepends = [
    base doctest doctest-prop mtl process random syb vector
  ];
  testDepends = [ python ];
  buildDepends = [ python ];
  description = "CMA-ES wrapper in Haskell";
  license = "unknown";
  hydraPlatforms = stdenv.lib.platforms.none;
}

release.nix

let

nixpkgsRev = "bc260badaebf67442befe20fb443034d3a91f2b3"; # 20.09-beta
nixpkgsSha256 = "1iysc4xyk88ngkfb403xfq5bs3zy29zfs83pn99kchxd45nbpb5q";

nixpkgs = fetchTarball {
  url = "https://github.com/nixos/nixpkgs/archive/${nixpkgsRev}.tar.gz";
  sha256 = nixpkgsSha256;
};

myHaskellPackageOverlay = self: super: {
  myHaskellPackages = super.haskellPackages.override {
    overrides = hself: hsuper: rec {

      doctest-prop = hself.callCabal2nix "doctest-prop" (builtins.fetchGit {
        url = "file:///Users/dom/doctest-prop";
        rev = "a6afb6dc8a8fe734e25990face413fe144b998c1";
      }) { };

    };
  };
};

in

{ pkgs ? import nixpkgs { overlays = [ myHaskellPackageOverlay ]; } }:

pkgs.myHaskellPackages.callPackage ./default.nix { }