diff --git a/Makefile.builder b/Makefile.builder
new file mode 100644
index 0000000..53cd005
--- /dev/null
+++ b/Makefile.builder
@@ -0,0 +1,3 @@
+ifeq ($(PACKAGE_SET),dom0)
+RPM_SPEC_FILES := rpm_spec/core-dom0-linux.spec rpm_spec/core-dom0-vaio-fixes.spec
+endif