servant/nix/shell.nix

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{ pkgs ? import <nixpkgs> {}
, compiler ? "ghc821"
, tutorial ? false
}:
with pkgs;
let
ghc = haskell.packages.${compiler}.ghcWithPackages (_: []);
docstuffs = python3.withPackages (ps: with ps; [ recommonmark sphinx sphinx_rtd_theme ]);
in
stdenv.mkDerivation {
name = "servant-dev";
buildInputs = [ ghc zlib python3 wget ]
++ (if tutorial then [docstuffs postgresql] else []);
shellHook = ''
eval $(grep export ${ghc}/bin/ghc)
export LD_LIBRARY_PATH="${zlib}/lib";
'';
}