{ spellChecking ? true , stdenv, fetchurl, pkgconfig, gtk, gtkspell ? null, gnet , libxml2, perl, pcre }: assert pkgconfig != null && gtk != null && gnet != null && libxml2 != null && perl != null && pcre != null; assert spellChecking -> gtkspell != null /* !!! && gtk == gtkspell.gtk */; # !!! assert gtk.glib == gnet.glib; stdenv.mkDerivation { name = "pan-0.14.2.91"; src = fetchurl { url = http://pan.rebelbase.com/download/releases/0.14.2.91/SOURCE/pan-0.14.2.91.tar.bz2; md5 = "4770d899a1c1ba968ce96bc5aeb07b62"; }; buildInputs = [ pkgconfig gtk gnet libxml2 perl pcre (if spellChecking then gtkspell else null) ]; inherit spellChecking stdenv; }