diff --git a/SCsub b/SCsub
index 9efa17c..b0e1a96 100644
--- a/SCsub
+++ b/SCsub
@@ -4,6 +4,15 @@ Import('env')
 
 module_env = env.Clone()
 
+module_env.pmlpp_build_old_classes = True
+module_env.pmlpp_build_tests = True
+
+if ARGUMENTS.get('pmlpp_build_old_classes', 'yes') == 'no':
+    module_env.pmlpp_build_old_classes = False
+
+if ARGUMENTS.get('pmlpp_build_tests', 'yes') == 'no':
+    module_env.pmlpp_build_tests = False
+
 sources = [
     "register_types.cpp",
 
diff --git a/config.py b/config.py
index ba05547..9d1bccd 100644
--- a/config.py
+++ b/config.py
@@ -3,8 +3,7 @@ def can_build(env, platform):
     return True
 
 def configure(env):
-    env.pmlpp_build_old_classes = True
-    env.pmlpp_build_tests = True
+    pass
 
 def get_doc_classes():
     return [