anchor.diff:    configureScript = "./bootstrap.sh";
     configureFlags = "--with-icu=${icu} --with-python=${python}/bin/python";
   
  -  buildPhase = "./b2 -j$NIX_BUILD_CORES -sEXPAT_INCLUDE=${expat}/include -sEXPAT_LIBPATH=${expat}/lib --layout=${finalLayout} variant=${variant} threading=${threading} link=${link} ${cflags} install";
  +  buildPhase = "./b2 -j$NIX_BUILD_CORES -sEXPAT_INCLUDE=${expat}/include -sEXPAT_LIBPATH=${expat}/lib --layout=${layout} variant=${variant} threading=${threading} link=${link} ${cflags} install";
   
     installPhase = ":";
   
  
positive.code: , enableStatic ? false
  , enablePIC ? false
  , enableExceptions ? false
  }:
  
  let
  
negative.code:       cat << EOF > user-config.jam
        using gcc : cross : $crossConfig-g++ ;
        EOF
        ./b2 -j$NIX_BUILD_CORES -sEXPAT_INCLUDE=${expat.hostDrv}/include -sEXPAT_LIBPATH=${expat.hostDrv}/lib --layout=${layout} --user-config=user-config.jam toolset=gcc-cross variant=${variant} threading=${threading} link=${link} ${cflags} --without-python install
      '';
    };
  }
  