anchor.diff:  
   mkDerivation rec {
     pname = "calibre";
  -  version = "3.47.0";
  +  version = "3.47.1";
   
     src = fetchurl {
       url = "https://download.calibre-ebook.com/${version}/${pname}-${version}.tar.xz";
  -    sha256 = "0mjj47w9pa7ihycialijrfq2qk107dcxwcwriz3b2mg4lixlawy4";
  +    sha256 = "17lz6rawlv268vv8i5kj59rswsipq3c14066adaz1paw54zr62dk";
     };
   
     patches = [
  
positive.code:   };
  
    ebookEditDesktopItem = makeDesktopItem {
      name = "calibre-edit-ebook";
      desktopName = "Edit E-book";
      genericName = "E-book Editor";
      comment = "Edit e-books";
  
negative.code:   disallowedReferences = [ podofo.dev ];
  
    calibreDesktopItem = makeDesktopItem {
      name = "calibre-gui";
      desktopName = "calibre";
      exec = "@out@/bin/calibre --detach %F";
      genericName = "E-book library management";
  