diff --git a/lizardfs.spec b/lizardfs.spec
index e4317d5..0ce7220 100644
--- a/lizardfs.spec
+++ b/lizardfs.spec
@@ -1,3 +1,5 @@
+%define __cmake_in_source_build 1
+
 Name:		lizardfs
 Summary:	Distributed, fault tolerant file system
 Version:	3.12.0