Rakefile in spank-0.0.1 vs Rakefile in spank-0.0.2

@@ -4,10 +4,15 @@
 
 task :spec do
   system 'rspec'
 end
 
-task :build do
+task :clean do
+  system 'rm *.gem'
+  system 'rm -fr pkg'
+end
+
+task :build => :clean do
   system 'gem build spank.gemspec'
 end
 
 task :publish => :build do
   system 'gem push *.gem'