I am trying to get a decent navigation between my methods in TextMate. I would love to have a list of them in a drawer, but I guess there is no such solution yet, right? Therefore I am trying to set up `RubyAMP` to work with `Ruby 1.9.1-p378` installed via `RVM`, but have some troubles. RubyAMP needs `ruby-debug`, and here is what I get if I try to install the gem

```
$ rvm gem install ruby-debug
info: ruby-1.9.1-p378: ruby 1.9.1p378 (2010-01-10 revision 26273) [x86_64-darwin10] 
Building native extensions.  This could take a while...

ERROR:  Error installing ruby-debug:
    ERROR: Failed to build gem native extension.

/Users/andrei/.rvm/rubies/ruby-1.9.1-p378/bin/ruby extconf.rb
Can't handle 1.9.x yet
*** extconf.rb failed ***

```

However, [the gem page](http://github.com/mark-moseley/ruby-debug) says that it should work with 1.9.x. How can I fix it?