diff --git a/Makefile.inc1 b/Makefile.inc1
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1076,8 +1076,7 @@
 	${_+_}cd ${.CURDIR}; ${BMAKE} _NO_INCLUDE_COMPILERMK=t _cleanobj_fast_depend_hack
 .endif
 	${_+_}cd ${.CURDIR}; ${BMAKE} bootstrap-tools
-	mkdir -p ${WORLDTMP}/usr ${WORLDTMP}/lib/casper ${WORLDTMP}/lib/geom \
-	    ${WORLDTMP}/bin
+	mkdir -p ${WORLDTMP}/usr ${WORLDTMP}/lib/geom ${WORLDTMP}/bin
 	${WORLDTMP_MTREE} -f ${.CURDIR}/etc/mtree/BSD.usr.dist \
 	    -p ${WORLDTMP}/usr >/dev/null
 	${WORLDTMP_MTREE} -f ${.CURDIR}/etc/mtree/BSD.include.dist \
@@ -3316,7 +3315,6 @@
 	${MAKE} -f ${.CURDIR}/Makefile.inc1 ${.MAKEFLAGS} ${.TARGET} \
 	    -V OLD_LIBS -V MOVED_LIBS -V "OLD_LIBS:Mlib/*:S,^lib,usr/lib32," \
 	    -V "OLD_LIBS:Musr/lib/*:S,^usr/lib,usr/lib32," \
-	    -V "OLD_LIBS:Mlib/casper/*:S,^lib/casper,usr/lib32," | \
 	    sed -E 's/[[:space:]]+/\n/g' | sort
 
 delete-old-libs: .PHONY
diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -52,6 +52,17 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 2023xxxx: libcasper libraries moved to /lib
+MOVED_LIBS+=lib/casper/libcap_dns.so.2
+MOVED_LIBS+=lib/casper/libcap_fileargs.so.1
+MOVED_LIBS+=lib/casper/libcap_grp.so.1
+MOVED_LIBS+=lib/casper/libcap_net.so.1
+MOVED_LIBS+=lib/casper/libcap_pwd.so.1
+MOVED_LIBS+=lib/casper/libcap_sysctl.so.1
+MOVED_LIBS+=lib/casper/libcap_sysctl.so.2
+MOVED_LIBS+=lib/casper/libcap_syslog.so.1
+OLD_DIRS+=lib/casper
+
 # 20230320: vcount.9 removed
 OLD_FILES+=usr/share/man/man9/count_dev.9.gz
 OLD_FILES+=usr/share/man/man9/vcount.9.gz
diff --git a/etc/mtree/BSD.root.dist b/etc/mtree/BSD.root.dist
--- a/etc/mtree/BSD.root.dist
+++ b/etc/mtree/BSD.root.dist
@@ -104,8 +104,6 @@
         ..
     ..
     lib
-        casper
-        ..
         geom
         ..
         nvmecontrol
diff --git a/lib/libcasper/services/cap_dns/Makefile b/lib/libcasper/services/cap_dns/Makefile
--- a/lib/libcasper/services/cap_dns/Makefile
+++ b/lib/libcasper/services/cap_dns/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/lib/libcasper/services/cap_fileargs/Makefile b/lib/libcasper/services/cap_fileargs/Makefile
--- a/lib/libcasper/services/cap_fileargs/Makefile
+++ b/lib/libcasper/services/cap_fileargs/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/lib/libcasper/services/cap_grp/Makefile b/lib/libcasper/services/cap_grp/Makefile
--- a/lib/libcasper/services/cap_grp/Makefile
+++ b/lib/libcasper/services/cap_grp/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/lib/libcasper/services/cap_net/Makefile b/lib/libcasper/services/cap_net/Makefile
--- a/lib/libcasper/services/cap_net/Makefile
+++ b/lib/libcasper/services/cap_net/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/lib/libcasper/services/cap_netdb/Makefile b/lib/libcasper/services/cap_netdb/Makefile
--- a/lib/libcasper/services/cap_netdb/Makefile
+++ b/lib/libcasper/services/cap_netdb/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/lib/libcasper/services/cap_pwd/Makefile b/lib/libcasper/services/cap_pwd/Makefile
--- a/lib/libcasper/services/cap_pwd/Makefile
+++ b/lib/libcasper/services/cap_pwd/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/lib/libcasper/services/cap_sysctl/Makefile b/lib/libcasper/services/cap_sysctl/Makefile
--- a/lib/libcasper/services/cap_sysctl/Makefile
+++ b/lib/libcasper/services/cap_sysctl/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/lib/libcasper/services/cap_syslog/Makefile b/lib/libcasper/services/cap_syslog/Makefile
--- a/lib/libcasper/services/cap_syslog/Makefile
+++ b/lib/libcasper/services/cap_syslog/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SHLIBDIR?=	/lib/casper
+SHLIBDIR?=	/lib
 
 .include <src.opts.mk>
 
diff --git a/libexec/rtld-elf/rtld_paths.h b/libexec/rtld-elf/rtld_paths.h
--- a/libexec/rtld-elf/rtld_paths.h
+++ b/libexec/rtld-elf/rtld_paths.h
@@ -69,7 +69,7 @@
 #endif
 
 #ifndef STANDARD_LIBRARY_PATH
-#define	STANDARD_LIBRARY_PATH	"/lib/casper:/lib:/usr/lib"
+#define	STANDARD_LIBRARY_PATH	"/lib:/usr/lib"
 #endif
 
 #ifndef LD_
diff --git a/tools/build/Makefile b/tools/build/Makefile
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -354,7 +354,6 @@
 # yet (this happens if we are crossbuilding from Linux/Mac).
 INSTALLDIR_LIST= \
 	bin \
-	lib/casper \
 	lib/geom \
 	usr/include/casper \
 	usr/include/private/ucl \
diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -855,14 +855,14 @@
 
 .if ${MK_CASPER} == no
 OLD_LIBS+=lib/libcasper.so.1
-OLD_LIBS+=lib/casper/libcap_dns.so.2
-OLD_LIBS+=lib/casper/libcap_fileargs.so.1
-OLD_LIBS+=lib/casper/libcap_grp.so.1
-OLD_LIBS+=lib/casper/libcap_net.so.1
-OLD_LIBS+=lib/casper/libcap_pwd.so.1
-OLD_LIBS+=lib/casper/libcap_sysctl.so.1
-OLD_LIBS+=lib/casper/libcap_sysctl.so.2
-OLD_LIBS+=lib/casper/libcap_syslog.so.1
+OLD_LIBS+=lib/libcap_dns.so.2
+OLD_LIBS+=lib/libcap_fileargs.so.1
+OLD_LIBS+=lib/libcap_grp.so.1
+OLD_LIBS+=lib/libcap_net.so.1
+OLD_LIBS+=lib/libcap_pwd.so.1
+OLD_LIBS+=lib/libcap_sysctl.so.1
+OLD_LIBS+=lib/libcap_sysctl.so.2
+OLD_LIBS+=lib/libcap_syslog.so.1
 .endif
 
 .if ${MK_CCD} == no