Rake is fuckin silly

rake.rb

14:41 <ruby-1.9.2-p180> ~/develop/gavdihrpif (master) > irb
ruby-1.9.2-p180-fastrequire :001 > install
NameError: undefined local variable or method `install' for main:Object
	from (irb):1
	from /home/rupert/.rvm/rubies/ruby-1.9.2-p180-fastrequire/bin/irb:16:in `<main>'
ruby-1.9.2-p180-fastrequire :002 > require 'rake'
true
ruby-1.9.2-p180-fastrequire :003 > install
ArgumentError: wrong number of arguments (1 for 2)
	from /home/rupert/.rvm/rubies/ruby-1.9.2-p180-fastrequire/lib/ruby/1.9.1/fileutils.rb:846:in `install'
	from /home/rupert/.rvm/rubies/ruby-1.9.2-p180-fastrequire/lib/ruby/1.9.1/rake.rb:1092:in `install'
	from (irb):3
	from /home/rupert/.rvm/rubies/ruby-1.9.2-p180-fastrequire/bin/irb:16:in `<main>'
ruby-1.9.2-p180-fastrequire :004 >