anchor.diff:  { fetchurl, stdenv, makeWrapper, gnum4, texinfo, texLive, automake }:
   
   let
  -  version = "9.1.1";
  +  version = "9.2";
     bootstrapFromC = ! (stdenv.isi686 || stdenv.isx86_64);
   
     arch = if      stdenv.isi686   then "-i386"
  
positive.code:   # XXX: The `check' target doesn't exist.
    doCheck = false;
  
    meta = {
      description = "MIT/GNU Scheme, a native code Scheme compiler";
  
      longDescription =
  
negative.code:     if stdenv.isi686
      then fetchurl {
        url = "mirror://gnu/mit-scheme/stable.pkg/${version}/mit-scheme-${version}-i386.tar.gz";
        sha256 = "1fmlpnhf5a75db93phajh4ysbdgrgl72v45lk3kznriprl0a7jc6";
      } else if stdenv.isx86_64
      then fetchurl {
        url = "mirror://gnu/mit-scheme/stable.pkg/${version}/mit-scheme-${version}-x86-64.tar.gz";
        sha256 = "1skzxxhr0iq96bf0j5m7mvf3i4sppfyfa6gpqn34mwgkw1fx8274";
      } else fetchurl {
        url = "mirror://gnu/mit-scheme/stable.pkg/${version}/mit-scheme-c-${version}.tar.gz";
        sha256 = "0w5ib5vsidihb4hb6fma3sp596ykr8izagm57axvgd6lqzwicsjg";
      };
  
    configurePhase =
  