anchor.diff:      # Will appear in 3.1.0
       # https://github.com/libical/libical/issues/350
       ./respect-env-tzdir.patch
  -
  -    # Fixes tests with 32-bit time_t
  -    # Remove with next version update (v3.0.16+)
  -    (fetchurl {
  -      url = "https://github.com/libical/libical/commit/4adc6f1d2b39a1cc3363b57215e12fa81076498b.patch";
  -      sha256 = "1k3hav0z86kc1xd1sk23b57aqqjk4gf73574w7f1m66cyz98bxr3";
  -    })
  -    (fetchurl {
  -      url = "https://github.com/libical/libical/commit/cce20bd051408b00521385c0bfb616ba068450d3.patch";
  -      sha256 = "097hqmagl0q5p38r1kvx0592cfac2y7jbdqlis6m8gbs812pbqfc";
  -    })
     ];
   
     # Using install check so we do not have to manually set
  
positive.code: { lib
  , stdenv
  , fetchFromGitHub
  , fetchurl
  , buildPackages
  , cmake
  , glib
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "libical";
    version = "3.0.16";
  
    outputs = [ "out" "dev" ]; # "devdoc" ];
  
  