anchor.diff:  
     # pkgconfig has a broken prefix
     preFixup = ''
  -    sed -i "s,prefix=.*,prefix=$out," $out/lib/pkgconfig/*.pc
  +    sed -i "s,prefix=.*,prefix=$out," $out/share/pkgconfig/pycairo.pc
     '';
   
     passthru = {
  
positive.code:     };
    };
  
    meta = with stdenv.lib; {
      description = "Python bindings for the cairo library";
      homepage = http://cairographics.org/pycairo/;
      license = with licenses; [
  
negative.code: }:
  
  let
    inherit (lib)
      optionalString;
  
    version = "1.15.4";
  in
  buildPythonPackage rec {
    name = "pycairo-${version}";
  
    src = fetchurl {
      url = "https:/github.com/pygobject/pycairo/releases/download/v${version}/"
        + "pycairo-${version}.tar.gz";
      hashOutput = false;
      sha256 = "ee4c3068c048230e5ce74bb8994a024711129bde1af1d76e3276c7acd81c4357";
    };
  
    buildInputs = [
  