anchor.diff:          packageRequires = [];
           meta = {
             homepage = "https://elpa.gnu.org/packages/uni-confusables.html";
  +          license = lib.licenses.free;
  +        };
  +      }) {};
  +    uniquify-files = callPackage ({ elpaBuild, emacs, fetchurl, lib }:
  +      elpaBuild {
  +        pname = "uniquify-files";
  +        ename = "uniquify-files";
  +        version = "1.0";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/uniquify-files-1.0.tar";
  +          sha256 = "1n1r3pmnh9b8zb7pyv158pzmvha4gqqrfrapvpjdcrcnnd2dynkm";
  +        };
  +        packageRequires = [ emacs ];
  +        meta = {
  +          homepage = "https://elpa.gnu.org/packages/uniquify-files.html";
             license = lib.licenses.free;
           };
         }) {};
  
positive.code:       elpaBuild {
          pname = "org";
          ename = "org";
          version = "9.2.3";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/org-9.2.3.tar";
            sha256 = "0hqy4lns9q5p0l1ylgmlckqprn9sbasszhznanmv0rsh0gzhsbyw";
          };
          packageRequires = [];
          meta = {
  
negative.code:           url = "https://elpa.gnu.org/packages/async-1.9.2.tar";
            sha256 = "17fnvrj7jww29sav6a6jpizclg4w2962m6h37akpii71gf0vrffw";
          };
          packageRequires = [ cl-lib nadvice ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/async.html";
            license = lib.licenses.free;
  