{stdenv, fetchurl}: stdenv.mkDerivation rec { name = "libunwind-0.98.6"; src = fetchurl { url = "http://download.savannah.nongnu.org/releases/libunwind/${name}.tar.gz"; sha256 = "1qfxqkyx4r5dmwajyhvsyyl8zwxs6n2rcg7a61fgfdfp0gxvpzgx"; }; NIX_CFLAGS_COMPILE = if stdenv.system == "x86_64-linux" then "-fPIC" else ""; meta = { homepage = http://www.nongnu.org/libunwind; description = "A portable and efficient API to determine the call-chain of a program"; }; }