diff --git a/share/mk/dirdeps.mk b/share/mk/dirdeps.mk
index a97d489e0ce1..f2e006c6c8af 100644
--- a/share/mk/dirdeps.mk
+++ b/share/mk/dirdeps.mk
@@ -122,6 +122,23 @@ _DIRDEP_USE_LEVEL?= 0
 # and non-specific Makefile.depend*
 
 .if !target(_DIRDEP_USE)
+
+.if ${MAKEFILE:T} == ${.PARSEFILE} && empty(DIRDEPS) && ${.TARGETS:Uall:M*/*} != ""
+# This little trick let's us do
+#
+# mk -f dirdeps.mk some/dir.${TARGET_SPEC}
+#
+all:
+${.TARGETS:Nall}: all
+DIRDEPS := ${.TARGETS:M*[/.]*}
+# so that -DNO_DIRDEPS works
+DEP_RELDIR := ${DIRDEPS:[1]:R}
+# this will become DEP_MACHINE below
+TARGET_MACHINE := ${DIRDEPS:[1]:E:C/,.*//}
+# disable DIRDEPS_CACHE as it does not like this trick
+MK_DIRDEPS_CACHE = no
+.endif
+
 # make sure we get the behavior we expect
 .MAKE.SAVE_DOLLARS = no
 
@@ -245,20 +262,6 @@ DEP_${TARGET_SPEC_VARS:[$i]} := ${_tspec:[$i]}
 DEP_MACHINE := ${_DEP_TARGET_SPEC}
 .endif
 
-.if ${MAKEFILE:T} == ${.PARSEFILE} && empty(DIRDEPS) && ${.TARGETS:Uall:M*/*} != ""
-# This little trick let's us do
-#
-# mk -f dirdeps.mk some/dir.${TARGET_SPEC}
-#
-all:
-${.TARGETS:Nall}: all
-DIRDEPS := ${.TARGETS:M*/*}
-# so that -DNO_DIRDEPS works
-DEP_RELDIR := ${DIRDEPS:R:[1]}
-# disable DIRDEPS_CACHE as it does not like this trick
-MK_DIRDEPS_CACHE = no
-.endif
-
 # reset each time through
 _build_all_dirs =
 
@@ -285,7 +288,7 @@ _DEP_RELDIR := ${DEP_RELDIR}
 # pickup customizations
 # as below you can use !target(_DIRDEP_USE) to protect things
 # which should only be done once.
-.-include "local.dirdeps.mk"
+.-include <local.dirdeps.mk>
 
 .if !target(_DIRDEP_USE)
 # things we skip for host tools
@@ -305,7 +308,13 @@ DEP_SKIP_DIR = ${SKIP_DIR} \
 
 NSkipDir = ${DEP_SKIP_DIR:${M_ListToSkip}}
 
-.if defined(NO_DIRDEPS) || defined(NODIRDEPS) || defined(WITHOUT_DIRDEPS)
+.if defined(NODIRDEPS) || defined(WITHOUT_DIRDEPS)
+NO_DIRDEPS =
+.elif defined(WITHOUT_DIRDEPS_BELOW)
+NO_DIRDEPS_BELOW =
+.endif
+
+.if defined(NO_DIRDEPS)
 # confine ourselves to the original dir and below.
 DIRDEPS_FILTER += M${_DEP_RELDIR}*
 .elif defined(NO_DIRDEPS_BELOW)
@@ -371,7 +380,7 @@ MK_DIRDEPS_CACHE ?= no
 BUILD_DIRDEPS_CACHE ?= no
 BUILD_DIRDEPS ?= yes
 
-.if !defined(NO_DIRDEPS)
+.if !defined(NO_DIRDEPS) && !defined(NO_DIRDEPS_BELOW)
 .if ${MK_DIRDEPS_CACHE} == "yes"
 # this is where we will cache all our work
 DIRDEPS_CACHE?= ${_OBJDIR}/dirdeps.cache${.TARGETS:Nall:O:u:ts-:S,/,_,g:S,^,.,:N.}
@@ -453,7 +462,7 @@ _this_dir := ${SRCTOP}/${DEP_RELDIR}
 
 # on rare occasions, there can be a need for extra help
 _dep_hack := ${_this_dir}/${.MAKE.DEPENDFILE_PREFIX}.inc
-.-include "${_dep_hack}"
+.-include <${_dep_hack}>
 
 .if ${DEP_RELDIR} != ${_DEP_RELDIR} || ${DEP_TARGET_SPEC} != ${TARGET_SPEC}
 # this should be all
diff --git a/share/mk/gendirdeps.mk b/share/mk/gendirdeps.mk
index cacb57056076..4de2c4c69cbe 100644
--- a/share/mk/gendirdeps.mk
+++ b/share/mk/gendirdeps.mk
@@ -83,7 +83,7 @@ META_FILES := ${META_FILES:T:O:u}
 .export META_FILES
 
 # pickup customizations
-.-include "local.gendirdeps.mk"
+.-include <local.gendirdeps.mk>
 
 # these are actually prefixes that we'll skip
 # they should all be absolute paths
@@ -139,7 +139,8 @@ META2DEPS_CMD += -T ${TARGET_OBJ_SPEC}
 .endif
 META2DEPS_CMD += \
 	-R ${RELDIR} -H ${HOST_TARGET} \
-	${M2D_OBJROOTS:O:u:@o@-O $o@}
+	${M2D_OBJROOTS:O:u:@o@-O $o@} \
+	${M2D_EXCLUDES:O:u:@o@-X $o@} \
 
 
 M2D_OBJROOTS += ${OBJTOP} ${_OBJROOT} ${_objroot}
@@ -256,6 +257,7 @@ DIRDEPS := ${DIRDEPS:${GENDIRDEPS_FILTER:UNno:ts:}:C,//+,/,g:O:u}
 
 .if ${DEBUG_GENDIRDEPS:Uno:@x@${RELDIR:M$x}@} != ""
 .info ${RELDIR}: M2D_OBJROOTS=${M2D_OBJROOTS}
+.info ${RELDIR}: M2D_EXCLUDES=${M2D_EXCLUDES}
 .info ${RELDIR}: dir_list='${dir_list}'
 .info ${RELDIR}: dpadd_dir_list='${dpadd_dir_list}'
 .info ${RELDIR}: dirdep_list='${dirdep_list}'
diff --git a/share/mk/meta.autodep.mk b/share/mk/meta.autodep.mk
index ac0c40892e98..aa6c2d526eae 100644
--- a/share/mk/meta.autodep.mk
+++ b/share/mk/meta.autodep.mk
@@ -19,7 +19,7 @@ _this ?= ${.PARSEFILE}
 .if !target(__${_this}__)
 __${_this}__: .NOTMAIN
 
-.-include "local.autodep.mk"
+.-include <local.autodep.mk>
 
 .if defined(SRCS)
 # it would be nice to be able to query .SUFFIXES
@@ -56,6 +56,21 @@ _OBJTOP ?= ${OBJTOP}
 _OBJROOT ?= ${OBJROOT:U${_OBJTOP}}
 _DEPENDFILE := ${_CURDIR}/${.MAKE.DEPENDFILE:T}
 
+.if ${.MAKE.LEVEL} > 0 || ${BUILD_AT_LEVEL0:Uyes:tl} == "yes"
+# do not allow auto update if we ever built this dir without filemon
+NO_FILEMON_COOKIE = .nofilemon
+CLEANFILES += ${NO_FILEMON_COOKIE}
+.if ${.MAKE.MODE:Uno:Mnofilemon} != ""
+UPDATE_DEPENDFILE = NO
+all: ${NO_FILEMON_COOKIE}
+${NO_FILEMON_COOKIE}: .NOMETA
+	@echo UPDATE_DEPENDFILE=NO > ${.TARGET}
+.elif exists(${NO_FILEMON_COOKIE})
+UPDATE_DEPENDFILE = NO
+.warning ${RELDIR} built with nofilemon; UPDATE_DEPENDFILE=NO
+.endif
+.endif
+
 .if ${.MAKE.LEVEL} == 0
 .if ${BUILD_AT_LEVEL0:Uyes:tl} == "no"
 UPDATE_DEPENDFILE = NO