anchor.diff:        elpaBuild {
           pname = "rcirc-color";
           ename = "rcirc-color";
  -        version = "0.4.1";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/rcirc-color-0.4.1.el";
  -          sha256 = "1zs3i3xr8zbjr8hzr1r1qx7mqb2wckpn25qh9444c9as2dnh9sn9";
  +        version = "0.4.2";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/rcirc-color-0.4.2.tar";
  +          sha256 = "0pa9p018kwsy44cmkli7x6cz1abxkyi26ac7w3vh99qp7x97dia3";
           };
           packageRequires = [ emacs ];
           meta = {
  
positive.code:       elpaBuild {
          pname = "auctex";
          ename = "auctex";
          version = "13.0.3";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/auctex-13.0.3.tar";
            sha256 = "1ljpkr0z15fyh907jbgky238dvci5vqi3xhvslyhblhp8sg9cbsi";
          };
          packageRequires = [ cl-lib emacs ];
          meta = {
  
negative.code:           license = lib.licenses.free;
          };
        }) {};
      hiddenquote = callPackage ({ elpaBuild, emacs, fetchurl, lib }:
        elpaBuild {
          pname = "hiddenquote";
          ename = "hiddenquote";
          version = "1.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/hiddenquote-1.1.tar";
            sha256 = "1j692ka84z6k9c3bhcn28irym5fga4d1wvhmvzvixdbfwn58ivw5";
          };
          packageRequires = [ emacs ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/hiddenquote.html";
            license = lib.licenses.free;
          };
        }) {};
      highlight-escape-sequences = callPackage ({ elpaBuild
                                                , fetchurl
                                                , lib }:
  