anchor.diff:          packageRequires = [ emacs ];
           meta = {
             homepage = "https://elpa.gnu.org/packages/code-cells.html";
  -          license = lib.licenses.free;
  -        };
  -      }) {};
  -    coffee-mode = callPackage ({ elpaBuild, fetchurl, lib }:
  -      elpaBuild {
  -        pname = "coffee-mode";
  -        ename = "coffee-mode";
  -        version = "0.4.1.1";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/coffee-mode-0.4.1.1.el";
  -          sha256 = "1jffd8rqmc3l597db26rggis6apf91glyzm1qvpf5g3iz55g6slz";
  -        };
  -        packageRequires = [];
  -        meta = {
  -          homepage = "https://elpa.gnu.org/packages/coffee-mode.html";
             license = lib.licenses.free;
           };
         }) {};
  
positive.code:         packageRequires = [ emacs ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/modus-themes.html";
            license = lib.licenses.free;
          };
        }) {};
      modus-vivendi-theme = callPackage ({ elpaBuild
                                         , emacs
                                         , fetchurl
                                         , lib
                                         , modus-themes }:
        elpaBuild {
          pname = "modus-vivendi-theme";
          ename = "modus-vivendi-theme";
          version = "0.13.2";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/modus-vivendi-theme-0.13.2.tar";
            sha256 = "1qn3kzxwf81zc7gprd9wblhb8b8akdkxwajpgk036y8i4cmvmspn";
          };
          packageRequires = [ emacs modus-themes ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/modus-vivendi-theme.html";
            license = lib.licenses.free;
          };
        }) {};
  
negative.code:       elpaBuild {
          pname = "org-transclusion";
          ename = "org-transclusion";
          version = "1.3.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/org-transclusion-1.3.1.tar";
            sha256 = "1v7i2i28500p4gvikcpp931qpks9zmvfpf6lfzrqdqppx2ix295q";
          };
          packageRequires = [ emacs org ];
          meta = {
  