{ pkgs ? import <nixpkgs> {}
, ghc ? null
, withHoogle ? false
}:
let
  haskellPackages =
    if ghc == null
    then pkgs.haskellPackages
    else pkgs.haskell.packages.${ghc};
  hs = haskellPackages.extend (with pkgs.haskell.lib; hself: hsuper:
    {
      symantic-compta = buildFromSdist (hself.callCabal2nix "symantic-compta" ./. {});
      symantic-document = buildFromSdist (hself.callCabal2nix "symantic-document"
        (pkgs.fetchgit {
          url = "git://git.sourcephile.fr/haskell/symantic-document.git";
          rev = "refs/heads/master";
          sha256 = "sha256-h2mzSKDWNSFs879qE8kma0z1vgWA32LWERRf9I+PqmE=";
        }) {});
    }
  );
in hs.symantic-compta // {
  shell = hs.shellFor {
    #doBenchmark = true;
    packages = p: [ p.symantic-compta ];
    nativeBuildInputs = [
      hs.cabal-install
      hs.ghcid
      hs.haskell-language-server
    ];
    buildInputs = [
    ];
    inherit withHoogle;
  };
}