{ nixpkgs ? import <nixpkgs> {}, compiler ? "default", doBenchmark ? false }:

let

  inherit (nixpkgs) pkgs;

  mateamt =
    haskellPackages.callPackage(
      { mkDerivation, aeson, base, base16-bytestring, base64-bytestring
      , bytestring, case-insensitive, clock, containers, HsYAML
      , http-api-data, http-types, iproute, mtl, network, opaleye
      , optparse-applicative, postgresql-simple
      , postgresql-simple-migration, product-profunctors, profunctors
      , pureMD5, random-bytestring, servant, servant-rawm, servant-server
      , stdenv, stm, text, time, wai, wai-logger, wai-middleware-throttle
      , warp
      }:
      mkDerivation {
        pname = "mateamt";
        version = "0.0.0.0";
        src = ../mateamt;
        isLibrary = true;
        isExecutable = true;
        libraryHaskellDepends = [
          aeson base base16-bytestring base64-bytestring bytestring
          containers http-api-data http-types mtl opaleye postgresql-simple
          product-profunctors profunctors pureMD5 random-bytestring servant
          servant-rawm servant-server stm text time wai wai-logger warp
        ];
        executableHaskellDepends = [
          base base16-bytestring bytestring case-insensitive clock containers
          HsYAML iproute mtl network opaleye optparse-applicative
          postgresql-simple postgresql-simple-migration servant
          servant-server stm text time wai wai-logger wai-middleware-throttle
          warp
        ];
        description = "A whole new matemat";
        license = stdenv.lib.licenses.agpl3;
      }
    ) {};

  HsYAML =
    haskellPackages.callPackage(
      { mkDerivation, base, bytestring, containers, deepseq, mtl, parsec
      , QuickCheck, stdenv, tasty, tasty-quickcheck, text
      }:
      mkDerivation {
        pname = "HsYAML";
        version = "0.2.1.0";
        sha256 = "60f727d5c90e693ef71df7dcbed8f40b66d2db11375528043e0326749e861f83";
        isLibrary = true;
        isExecutable = true;
        libraryHaskellDepends = [
          base bytestring containers deepseq mtl parsec text
        ];
        testHaskellDepends = [
          base bytestring containers mtl QuickCheck tasty tasty-quickcheck
          text
        ];
        homepage = "https://github.com/hvr/HsYAML";
        description = "Pure Haskell YAML 1.2 processor";
        license = stdenv.lib.licenses.gpl2;
      }) {};

  i18n = 
    haskellPackages.callPackage(
      { mkDerivation, base, containers, directory, filepath, hspec, mtl
      , parsec, stdenv, tasty, tasty-hspec, text, transformers
      }:
      mkDerivation {
        pname = "i18n";
        version = "0.4.0.0";
        sha256 = "7e0df375883fb3428b0cd20aac1163ea38de80fd3499ec3007979b36fe2f93fa";
        revision = "1";
        editedCabalFile = "1sxiifn4m17294inyb4q7isbdd3s77zpqxafghpbfkz5hkrv0xxg";
        libraryHaskellDepends = [
          base containers directory filepath mtl parsec text transformers
        ];
        testHaskellDepends = [
          base containers hspec tasty tasty-hspec text
        ];
        doCheck = false;
        homepage = "https://github.com/filib/i18n";
        description = "Internationalization for Haskell";
        license = stdenv.lib.licenses.bsd3;
      }
    ) {};

    f = { mkDerivation, aeson, base, base64-bytestring, blaze-html
      , blaze-markup, bytestring, cookie, cryptonite, either, hashable
      , http-api-data, http-client, http-types
      , mtl, optparse-applicative, random-bytestring, servant
      , servant-blaze, servant-client, servant-client-core, servant-rawm
      , servant-server, split, stdenv, stm, text, wai, wai-app-static
      , wai-logger, wai-session, warp
      }:
      mkDerivation {
        pname = "matebeamter";
        version = "0.0.0.0";
        src = ./.;
        isLibrary = false;
        isExecutable = true;
        executableHaskellDepends = [
          aeson base base64-bytestring blaze-html blaze-markup bytestring
          cookie cryptonite either hashable HsYAML http-api-data http-client
          http-types i18n mateamt mtl optparse-applicative random-bytestring
          servant servant-blaze servant-client servant-client-core
          servant-rawm servant-server split stm text wai wai-app-static
          wai-logger wai-session warp
        ];
        description = "A reference frontent to mateamt";
        license = stdenv.lib.licenses.agpl3;
      };

  haskellPackages = if compiler == "default"
                       then pkgs.haskellPackages
                       else pkgs.haskell.packages.${compiler};

  variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;

  drv = variant (haskellPackages.callPackage f {});

in

  if pkgs.lib.inNixShell then drv.env else drv