Three Games and Perl Support for Irssi

Here are four patches. Three of them add expressions for games. The
fourth, irssi-perl.patch, adds perl as an input for irssi, so that one
can run perl plugins in irssi. I didn't make the perl input optional,
but maybe it should be to keep the irssi expression light.

svn path=/nixpkgs/trunk/; revision=21813

pkgs/applications/networking/irc/irssi/default.nix

@@ -1,4 +1,4 @@
-{stdenv, fetchurl, pkgconfig, ncurses, glib, openssl}:
+{stdenv, fetchurl, pkgconfig, ncurses, glib, openssl, perl}:
 
 stdenv.mkDerivation rec {
   name = "irssi-0.8.15";
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "19m0aah9bhc70dnhh7kpydbsz5n35l0l9knxav1df0sic3xicbf1";
   };
   
-  buildInputs = [pkgconfig ncurses glib openssl];
+  buildInputs = [pkgconfig ncurses glib openssl perl];
   
   NIX_LDFLAGS = "-lncurses";