anchor.diff:      description = "Comprehensive e-book software";
       homepage = "https://calibre-ebook.com";
       license = with licenses; if unrarSupport then unfreeRedistributable else gpl3;
  -    maintainers = with maintainers; [ domenkozar pSub AndersonTorres ];
  +    maintainers = with maintainers; [ domenkozar pSub ];
       platforms = platforms.linux;
  -    inherit version;
     };
   }
  
positive.code: }:
  
  let
    pypkgs = python2Packages;
  
  in
  mkDerivation rec {
    pname = "calibre";
    version = "4.12.0";
  
    src = fetchurl {
      url = "https://download.calibre-ebook.com/${version}/${pname}-${version}.tar.xz";
      sha256 = "144vl5p0adcywcqaarrriq5zd8q5i934yfjg9himiq1vdp9vy4fi";
    };
  
    patches = [
  
negative.code: , hyphen
  , unrarSupport ? false
  , chmlib
  , python3Packages
  , libusb1
  , libmtp
  , xdg_utils
  