{stdenv, fetchurl} : stdenv.mkDerivation { name = "rxp-1.2.3"; src = fetchurl { url = http://ftp.de.debian.org/debian/pool/main/r/rxp/rxp_1.2.3.orig.tar.gz; sha256 = "1r4khvmnl5231y37ji8f3mikxy0dhdz155wi3qihfi27mc1yv534"; }; NIX_CFLAGS_COMPILE = "-D_GNU_SOURCE"; installPhase = '' mkdir -p $out/bin cp rxp $out/bin ''; meta = { license = stdenv.lib.licenses.gpl2Plus; description = "a validating XML parser written in C"; homepage = "http://www.cogsci.ed.ac.uk/~richard/rxp.html"; }; }