{ system ? builtins.currentSystem
, config ? { android_sdk.accept_license = true; }, overlays ? []
, pkgs ? (import <nixpkgs> { inherit system config overlays; })
, target-os }:

with pkgs;
  let
    sanitized-target-os = 
      if (builtins.any (os: target-os == os) [ "linux" "android" "windows" "macos" "darwin" "ios" "all" ])
      then target-os
      else throw "Unknown value for target-os: '${target-os}'";
    # based on the value passed in through target-os, check if we're targetting a desktop platform
    targetDesktop = {
      "linux" = true;
      "windows" = true;
      "macos" = true;
      "darwin" = true;
      "all" = true;
    }.${sanitized-target-os} or false;
    # based on the value passed in through target-os, check if we're targetting a mobile platform
    targetMobile = {
      "android" = true;
      "ios" = true;
      "all" = true;
    }.${sanitized-target-os} or false;
    # TODO: Try to use stdenv for iOS. The problem is with building iOS as the build is trying to pass parameters to Apple's ld that are meant for GNU's ld (e.g. -dynamiclib)
    _stdenv = stdenvNoCC;
    statusDesktop = callPackage ./nix/desktop { inherit target-os; stdenv = _stdenv; };
    statusMobile = callPackage ./nix/mobile { inherit target-os config; status-go = status-go.package; stdenv = _stdenv; };
    status-go = callPackage ./nix/status-go { inherit (xcodeenv) composeXcodeWrapper; inherit (statusMobile) xcodewrapperArgs; androidPkgs = statusMobile.androidComposition; };
    nodejs' = pkgs.nodejs-10_x;
    yarn' = yarn.override { nodejs = nodejs'; };
    nodeInputs = import ./nix/global-node-packages/output {
      # The remaining dependencies come from Nixpkgs
      inherit pkgs;
      nodejs = nodejs';
    };
    nodePkgBuildInputs = [
      nodejs'
      python27 # for e.g. gyp
      yarn'
    ] ++ (map (x: nodeInputs."${x}") (builtins.attrNames nodeInputs));

  in _stdenv.mkDerivation rec {
    name = "status-react-build-env";

    buildInputs = with _stdenv; [
      clojure
      leiningen
      maven
      watchman

      status-go.package
    ] ++ nodePkgBuildInputs
      ++ lib.optional isDarwin cocoapods
      ++ lib.optional (!isDarwin) gcc7
      ++ lib.optionals targetDesktop statusDesktop.buildInputs
      ++ lib.optionals targetMobile statusMobile.buildInputs;
    shellHook =
      status-go.shellHook +
      lib.optionalString targetDesktop statusDesktop.shellHook +
      lib.optionalString targetMobile statusMobile.shellHook;
    hardeningDisable = status-go.hardeningDisable;
  }