{ mkDerivation, base, fetchurl }: mkDerivation { pname = "ratio-int"; version = "0.1.2"; src = fetchurl { url = "http://example.org/"; sha256 = "abc"; }; libraryHaskellDepends = [ base ]; homepage = "https://github.com/RaphaelJ/ratio-int"; description = "Fast specialisation of Data.Ratio for Int."; license = stdenv.lib.licenses.bsd3; }