{
  allowUnfree = true;
  packageOverrides = pkgs: rec {
    hsEnv = pkgs.haskellPackages.ghcWithPackages (haskellPackages: with
    haskellPackages; [
      # packunused
      Cabal
      aeson
      directory
      filepath
      ghc-mod
      haskell-src-exts
      http-conduit
      lens
      monad-logger
      mtl
      network-uri
      optparse-applicative
      persistent-sqlite
      persistent-template
      pointfree
      resourcet
      servant
      servant-server
      split
      string-conversions
      text
      time
      warp
    ]);
  };
  chromium = {
   enablePepperFlash = true; # Chromium's non-NSAPI alternative to Adobe Flash
  };
}