# Pastebin s69EvABJ
let
  pkgs = import <nixpkgs> {};
  # see description of extraPlugins
  postgresqlAndPlugins = pg: extraPlugins:
    pkgs.buildEnv {
      name = "postgresql-and-plugins-${(builtins.parseDrvName pg.name).version}";
      paths = [ pg pg.lib ] ++ extraPlugins;
      buildInputs = [ pkgs.makeWrapper ];
      postBuild =
        ''
          mkdir -p $out/bin
          rm $out/bin/{pg_config,postgres,pg_ctl}
          cp --target-directory=$out/bin ${pg}/bin/{postgres,pg_config,pg_ctl}
          wrapProgram $out/bin/postgres --set NIX_PGLIBDIR $out/lib
        '';
    };
  stdenv = pkgs.stdenv;
  inputs = [
    pkgs.nodejs-6_x
    pkgs.gmp
    pkgs.zlib.dev
    pkgs.zlib.out
    pkgs.pkgconfig
    (postgresqlAndPlugins pkgs.postgresql [pkgs.plv8])
  ];
in rec {
  devEnv = stdenv.mkDerivation rec {
    name = "dev-env";
    buildInputs = inputs;
  };
}