diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -44,7 +44,7 @@
         Nothing -> return Nothing
         Just (1,9,_) -> error $ unlines [ "Ruby 1.9 cannot be integrated with the GHC runtime. Tough luck :("
                                         , "On Ubuntu 14.04, you can try this:"
-                                        , "  apt-get install libruby2.0 ruby2.0-dev"
+                                        , "  apt-get install ruby2.0 libruby2.0 ruby2.0-dev"
                                         , "  cabal install hruby -p --configure-option=\"--rubyversion=20 --rubylib=ruby-2.0 --rubyinc=/usr/include/ruby-2.0.0 --rubyinc=/usr/include/x86_64-linux-gnu/ruby-2.0.0\""
                                         ]
         Just v@(1,8,_) -> return $ Just $ RubyInfo v
diff --git a/hruby.cabal b/hruby.cabal
--- a/hruby.cabal
+++ b/hruby.cabal
@@ -2,7 +2,7 @@
 --  see http://haskell.org/cabal/users-guide/
 
 name:                hruby
-version:             0.3.4.1
+version:             0.3.4.2
 synopsis:            Embed a Ruby intepreter in your Haskell program !
 description:         This doesn't work with Ruby 1.9. Everything you need should be in Foreign.Ruby.Safe.
 license:             BSD3