anchor.diff:    };
   
     ebookViewerDesktopItem = makeDesktopItem {
  +    fileValidation = false; # fails before substitution
       name = "calibre-ebook-viewer";
       desktopName = "E-book Viewer";
       genericName = "E-book Viewer";
  
positive.code:   disallowedReferences = [ podofo.dev ];
  
    calibreDesktopItem = makeDesktopItem {
      name = "calibre-gui";
      desktopName = "calibre";
      exec = "@out@/bin/calibre --detach %F";
  
negative.code:   };
  
    ebookEditDesktopItem = makeDesktopItem {
      fileValidation = false; # fails before substitution
      name = "calibre-edit-book";
      desktopName = "Edit E-book";
      genericName = "E-book Editor";
  