diff --git a/lib/rscons.rb b/lib/rscons.rb
index 061c97c..3763eb0 100644
--- a/lib/rscons.rb
+++ b/lib/rscons.rb
@@ -1,2 +1,8 @@
-require "rscons/version"
+require "rscons/builder"
 require "rscons/environment"
+require "rscons/version"
+
+module Rscons
+  DEFAULT_BUILDERS = [
+  ]
+end
diff --git a/lib/rscons/builder.rb b/lib/rscons/builder.rb
new file mode 100644
index 0000000..38c3ba7
--- /dev/null
+++ b/lib/rscons/builder.rb
@@ -0,0 +1,4 @@
+module Rscons
+  class Builder
+  end
+end