anchor.diff:  let
     sources = {
       "3.26" = {
  -      version = "3.26.0";
  -      sha256 = "f153a53391e9b42fed5cb6ce62322a58e323fde6ec4a54d8ba4d376cf4c1fbcb";
  +      version = "3.26.3";
  +      sha256 = "0efd01b8a0a9770d52fe7354d298874ed845449b88f3f78f49290729fc2d448d";
       };
     };
   
  
positive.code: { stdenv
  , fetchurl
  , gettext
  , intltool
  , lib
  , meson
  , ninja
  
  , file
  , glib
  , gmime
  , gobject-introspection
  , libarchive
  , libgcrypt
  , libsoup
  , libxml2
  
  , channel
  
negative.code:         outputHash
          outputHashAlgo
          urls;
        fullOpts = {
          sha256Urls =
            map (u: lib.replaceStrings ["tar.xz"] ["sha256sum"] u) src.urls;
        };
        failEarly = true;
      };
    };
  