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