anchor.diff:            license = lib.licenses.free;
           };
         }) {};
  +    shell-command-plus = callPackage ({ elpaBuild, emacs, fetchurl, lib }:
  +      elpaBuild {
  +        pname = "shell-command-plus";
  +        ename = "shell-command+";
  +        version = "2.2.0";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/shell-command+-2.2.0.tar";
  +          sha256 = "1ms2xk7xfgd3ngwm90hnmlxwpvyb167bislc2wr3ilfrirbbw476";
  +        };
  +        packageRequires = [ emacs ];
  +        meta = {
  +          homepage = "https://elpa.gnu.org/packages/shell-command+.html";
  +          license = lib.licenses.free;
  +        };
  +      }) {};
       shen-mode = callPackage ({ elpaBuild, fetchurl, lib }:
         elpaBuild {
           pname = "shen-mode";
  
positive.code:       elpaBuild {
          pname = "corfu";
          ename = "corfu";
          version = "0.8";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/corfu-0.8.tar";
            sha256 = "1qrrky1g4k5vw56435dgkwnmnri7i51gkydd76as3l0ixm4pnp05";
          };
          packageRequires = [ emacs ];
          meta = {
  
negative.code:       elpaBuild {
          pname = "tramp";
          ename = "tramp";
          version = "2.5.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/tramp-2.5.1.tar";
            sha256 = "1r7wifhzy2ipdlc4fqnx6549fnx45ggz57wh0cp7s6y25761si7q";
          };
          packageRequires = [ emacs ];
          meta = {
  