diff --git a/module_build_service/builder/__init__.py b/module_build_service/builder/__init__.py
index 49b34538..99c3c8b4 100644
--- a/module_build_service/builder/__init__.py
+++ b/module_build_service/builder/__init__.py
@@ -1,7 +1,6 @@
+from module_build_service import conf
 from base import GenericBuilder
 from KojiModuleBuilder import KojiModuleBuilder
-from CoprModuleBuilder import CoprModuleBuilder
-from MockModuleBuilder import MockModuleBuilder
 
 __all__ = [
     GenericBuilder
@@ -9,5 +8,11 @@ __all__ = [
 
 
 GenericBuilder.register_backend_class(KojiModuleBuilder)
-GenericBuilder.register_backend_class(CoprModuleBuilder)
-GenericBuilder.register_backend_class(MockModuleBuilder)
+
+if conf.system == "mock":
+    from MockModuleBuilder import MockModuleBuilder
+    GenericBuilder.register_backend_class(MockModuleBuilder)
+
+if conf.system == "copr":
+    from CoprModuleBuilder import CoprModuleBuilder
+    GenericBuilder.register_backend_class(CoprModuleBuilder)