diff --git a/Gemfile b/Gemfile
index e070301..d83c3e8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,13 @@ gem 'fakefs', :require => nil
 gem 'guard'
 gem 'guard-rspec'
 
-# TODO: make this more OS-independent...like the rest of the gem
-gem 'growl'
-gem 'rb-fsevent'
+require 'rbconfig'
+if Config::CONFIG['target_os'] =~ /darwin/i
+  gem 'rb-fsevent', '>= 0.3.9'
+  gem 'growl', '~> 1.0.3'
+end
+if Config::CONFIG['target_os'] =~ /linux/i
+  gem 'rb-inotify', '>= 0.5.1'
+  gem 'libnotify', '~> 0.1.3'
+end