anchor.diff:      ln -s ../maxima/${version}/doc $out/share/doc/maxima
     '';
   
  -  # The regression test suite has minor failures, but curiously enough
  -  # this doesn't seem to abort the build process:
  +  # Failures in the regression test suite are not going to abort the
  +  # build process. We run the suite mostly so that potential errors show
  +  # up in the build log. See also:
     # <http://sourceforge.net/tracker/?func=detail&aid=3365831&group_id=4933&atid=104933>.
     doCheck = true;
   
  
positive.code: 
    src = fetchurl {
      url = "mirror://sourceforge/${name}/${name}-${version}.tar.gz";
      sha256 = "8e98ad742151e52edb56337bd62c8a9749f7b598cb6ed4e991980e0e6f89706a";
    };
  
    buildInputs = [sbcl texinfo perl makeWrapper];
  
negative.code: 
  let
    name    = "maxima";
    version = "5.26.0";
  
    searchPath =
      stdenv.lib.makeSearchPath "bin"
  