diff --git a/cddl/sbin/Makefile b/cddl/sbin/Makefile
index f40f2a45e759..19daabd02b57 100644
--- a/cddl/sbin/Makefile
+++ b/cddl/sbin/Makefile
@@ -13,4 +13,6 @@ _zfs=	zfs
 _zpool=	zpool
 .endif
 
+SUBDIR_PARALLEL=
+
 .include <bsd.subdir.mk>
diff --git a/cddl/usr.bin/Makefile b/cddl/usr.bin/Makefile
index 533697d1ed00..69179c5545c8 100644
--- a/cddl/usr.bin/Makefile
+++ b/cddl/usr.bin/Makefile
@@ -26,4 +26,6 @@ _zstreamdump = zstreamdump
 .endif
 .endif
 
+SUBDIR_PARALLEL=
+
 .include <bsd.subdir.mk>
diff --git a/cddl/usr.sbin/Makefile b/cddl/usr.sbin/Makefile
index 73315ffa1a69..d309075a4306 100644
--- a/cddl/usr.sbin/Makefile
+++ b/cddl/usr.sbin/Makefile
@@ -46,4 +46,6 @@ _dtruss=	dtruss
 _lockstat=	lockstat
 .endif
 
+SUBDIR_PARALLEL=
+
 .include <bsd.subdir.mk>