anchor.diff:          packageRequires = [ emacs ];
           meta = {
             homepage = "https://elpa.gnu.org/packages/caml.html";
  +          license = lib.licenses.free;
  +        };
  +      }) {};
  +    cdlatex = callPackage ({ auctex, elpaBuild, fetchurl, lib }:
  +      elpaBuild {
  +        pname = "cdlatex";
  +        ename = "cdlatex";
  +        version = "4.12";
  +        src = fetchurl {
  +          url = "https://elpa.nongnu.org/nongnu/cdlatex-4.12.tar";
  +          sha256 = "1m8liqxz76r8f3b8hvyyn7kqgq0fkk5pv4pqgdscbgw36vpcbkry";
  +        };
  +        packageRequires = [ auctex ];
  +        meta = {
  +          homepage = "https://elpa.gnu.org/packages/cdlatex.html";
             license = lib.licenses.free;
           };
         }) {};
  
positive.code:           license = lib.licenses.free;
          };
        }) {};
      vc-fossil = callPackage ({ elpaBuild, fetchurl, lib }:
        elpaBuild {
          pname = "vc-fossil";
  
negative.code:       elpaBuild {
          pname = "popon";
          ename = "popon";
          version = "0.7";
          src = fetchurl {
            url = "https://elpa.nongnu.org/nongnu/popon-0.7.tar";
            sha256 = "0sr0cv9jlaj83sgk1cb7wd6r12g6gmzdjzm077gxa6jy9p4qrv0q";
          };
          packageRequires = [ emacs ];
          meta = {
  