diff --git a/lib/rscons/builder.rb b/lib/rscons/builder.rb
index 38c3ba7..fd2d26e 100644
--- a/lib/rscons/builder.rb
+++ b/lib/rscons/builder.rb
@@ -1,4 +1,7 @@
 module Rscons
   class Builder
+    def initialize(env)
+      @env = env
+    end
   end
 end