ref: 63aadc536ee5e95600a00fae4b1fb8c7ce7ac7b9
dir: /default.nix/
# nix-env -i -f ./default.nix
{ nixpkgs ? import <nixpkgs> {} }:
with nixpkgs; stdenv.mkDerivation rec {
  name = "orca";
  src = ./.;
  buildInputs = [ ncurses portmidi ];
  enableParallelBuilding = true;
  buildPhase = ''
    patchShebangs ./tool
    make
  '';
  installPhase = ''
    mkdir -p $out/bin
    cp build/orca $out/bin/orca
  '';
}