--- share/mk/src.libnames.mk.orig	2021-09-04 10:14:17.407288000 +0200
+++ share/mk/src.libnames.mk	2021-09-04 10:15:27.832153000 +0200
@@ -245,6 +245,9 @@
 # 2nd+ order consumers.  Auto-generating this would be better.
 _DP_80211=	sbuf bsdxml
 _DP_9p=		sbuf
+.if ${MK_CASPER} != "no"
+_DP_9p+=       casper cap_pwd cap_grp
+.endif
 _DP_archive=	z bz2 lzma bsdxml zstd
 _DP_zstd=	pthread
 .if ${MK_BLACKLIST} != "no"
