diff --git a/ypserv.spec b/ypserv.spec
index 3c79cbe..17ea68b 100644
--- a/ypserv.spec
+++ b/ypserv.spec
@@ -32,6 +32,8 @@ Patch12: ypserv-2.26-shadow.patch
 Patch13: ypserv-2.26-errmsg.patch
 BuildRequires: gdbm-devel
 BuildRequires: systemd-units
+Conflicts: systemd < 38
+Conflicts: filesystem < 3
 
 %description
 The Network Information Service (NIS) is a system that provides