adding xapian and xapian-bindings

svn path=/nixpkgs/trunk/; revision=16788

pkgs/development/interpreters/ruby/default.nix

@@ -27,4 +27,9 @@ makeOverridable (stdenv.mkDerivation) rec {
     homepage = "http://www.ruby-lang.org/en/";
     description = "The Ruby language";
   };
+
+  passthru = {
+    # install ruby libs into "$out/${ruby.libPath}"
+    libPath = "lib/ruby-1.8";
+  };
 }

pkgs/development/interpreters/ruby/ruby-19.nix

@@ -7,4 +7,8 @@ ruby18.override rec {
     url = "ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-${version}.tar.gz";
     sha256 = "1r4bls76dg97lqgwkxi6kbxzirkvjm21d4i2qyz469lnncvqwn9i";
   };
+
+  passthru = {
+    libPath = "lib/ruby-1.9";
+  };
 }