anchor.diff:        owner  = "ocaml";
         repo   = pname;
         rev    = version;
  -      sha256 = "1j2smhqrwy0zydhbyjkpnwzq05fgfa85kc0d9kzwq0mppdndspp4";
  +      sha256 = "0jpcjy2a77mywba2vm61knj26pgylsmv5a21cdp80q40bac4i6bb";
       };
       packageRequires = [ caml ];
       meta = { license = gpl3Plus; };
  
positive.code:     pname = "with-editor";
      version = magit.version;
      src = magit.src;
      packageRequires = [ dash ];
      fileSpecs = [ "Documentation/with-editor.texi" "lisp/with-editor.el" ];
      meta = { license = gpl3Plus; };
    };
  
negative.code: 
    swiper = melpaBuild rec {
      pname   = "swiper";
      version = "0.6.0";
      src = fetchFromGitHub {
        owner  = "abo-abo";
        repo   = pname;
        rev    = version;
        sha256 = "18madh4hvrk8sxrll84ry13n1l3ad1gnp3prj828sszrbbdp20ly";
      };
      fileSpecs = [ "swiper.el" "ivy.el" "colir.el" "counsel.el" ];
      meta = { license = gpl3Plus; };
  