nixpkgs flow override

{ nixpkgs ? (import <nixpkgs> { config = { 
    packageOverrides = nixpkgs: rec {
      flow = nixpkgs.flow.override {
        installPhase = ''
          cp frontend/classroom/node_modules/flow-bin/flow-linux64-v*/flow flow
          chmod a+rw flow
          patchelf \
            --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
            --set-rpath ".:${nixpkgs.stdenv.cc.libc}/lib" \
            flow
        '';
      };
    };
  };
})
, ghc ? nixpkgs.ghc
}:

with nixpkgs;

haskell.lib.buildStackProject {
  name = "freckle-megarepo";
  buildInputs = [ 
    # setup
    curl
    adoptopenjdk-jre-bin
    htop
    git
    gnumake
    postgresql
    openvpn
    unzip 
    xclip
    docker
    docker-compose
    awscli
    pcre
    glpk
    zlib
    haskellPackages.ghc
    haskellPackages.stack

    # frontend
    yarn
  ];
  inherit ghc;
  inherit flow;
}