anchor.diff:            license = lib.licenses.free;
           };
         }) {};
  +    excorporate = callPackage ({ elpaBuild, emacs, fetchurl, fsm, lib, soap-client, url-http-ntlm }:
  +    elpaBuild {
  +        pname = "excorporate";
  +        version = "0.7.1";
  +        src = fetchurl {
  +          url = "http://elpa.gnu.org/packages/excorporate-0.7.1.tar";
  +          sha256 = "1flvhk39yymskzazpwh95j2nj8kg4b02hsg7b8msnqi3q5lpqs54";
  +        };
  +        packageRequires = [ emacs fsm soap-client url-http-ntlm ];
  +        meta = {
  +          homepage = "http://elpa.gnu.org/packages/excorporate.html";
  +          license = lib.licenses.free;
  +        };
  +      }) {};
       exwm = callPackage ({ elpaBuild, fetchurl, lib, xelb }: elpaBuild {
           pname = "exwm";
  -        version = "0.2";
  -        src = fetchurl {
  -          url = "http://elpa.gnu.org/packages/exwm-0.2.tar";
  -          sha256 = "0z96zz6h5r880nbhclbxs2r0zfkg771lg0fjghigqxz8ai0hh1ll";
  +        version = "0.4";
  +        src = fetchurl {
  +          url = "http://elpa.gnu.org/packages/exwm-0.4.tar";
  +          sha256 = "1qlplx88mk8c5sahlymxxh46bzf6bxnsqk92wliv5ji4ai5373fb";
           };
           packageRequires = [ xelb ];
           meta = {
  
positive.code:     url-http-ntlm = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib, ntlm ? null }:
      elpaBuild {
          pname = "url-http-ntlm";
          version = "2.0.1";
          src = fetchurl {
            url = "http://elpa.gnu.org/packages/url-http-ntlm-2.0.1.tar";
            sha256 = "0h6xsm1x7v69kb4shyvv1p4f6sxgcqs5ap6ylqydz10mbcx7aq0w";
          };
          packageRequires = [ cl-lib ntlm ];
          meta = {
  
negative.code:     metar = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
      elpaBuild {
          pname = "metar";
          version = "0.2";
          src = fetchurl {
            url = "http://elpa.gnu.org/packages/metar-0.2.el";
            sha256 = "0rfzq79llh6ixw02kjpn8s2shxrabvfvsq48pagwak1jl2s0askf";
          };
          packageRequires = [ cl-lib ];
          meta = {
  