anchor.diff:  in
   
   stdenv.mkDerivation {
  -  name = "boost-1.43.0";
  +  name = "boost-1.44.0";
   
     meta = {
       homepage = "http://boost.org/";
  
positive.code:   };
  
    src = fetchurl {
      url = "mirror://sourceforge/boost/boost_1_43_0.tar.bz2";
      sha256 = "0831h19ph65r2rai6ipk5c2bx04af8q423mzr89fh454385i0krl";
    };
  
    buildInputs = [icu expat zlib bzip2 python];
  
negative.code:   configureScript = "./bootstrap.sh";
    configureFlags = "--with-icu=${icu} --with-python=${python}/bin/python";
  
    buildPhase = "./bjam -j$NIX_BUILD_CORES -sEXPAT_INCLUDE=${expat}/include -sEXPAT_LIBPATH=${expat}/lib --layout=${finalLayout} variant=${variant} threading=${threading} link=${link} ${cflags} install";
  
    installPhase = ":";
  }
  