diff --git a/nfs-ganesha.spec b/nfs-ganesha.spec
index 9027a95..b409bd1 100644
--- a/nfs-ganesha.spec
+++ b/nfs-ganesha.spec
@@ -1,5 +1,6 @@
 
 %global _hardened_build 1
+%global __cmake_in_source_build 1
 
 %if ( 0%{?suse_version} )
 BuildRequires: distribution-release