diff --git a/share/mk/bsd.clang-analyze.mk b/share/mk/bsd.clang-analyze.mk
index 474d2d1e816..8a49670df57 100644
--- a/share/mk/bsd.clang-analyze.mk
+++ b/share/mk/bsd.clang-analyze.mk
@@ -25,7 +25,7 @@
 #		output on stdout.
 
 .if !target(__<bsd.clang-analyze.mk>__)
-__<bsd.clang-analyze.mk>__:
+__<bsd.clang-analyze.mk>__:	.NOTMAIN
 
 .include <bsd.compiler.mk>
 
diff --git a/share/mk/bsd.compat.mk b/share/mk/bsd.compat.mk
index c41cfda5f01..6fa732fd730 100644
--- a/share/mk/bsd.compat.mk
+++ b/share/mk/bsd.compat.mk
@@ -1,6 +1,6 @@
 
 .if !targets(__<${_this:T}>__)
-__<${_this:T}>__:
+__<${_this:T}>__:	.NOTMAIN
 
 .include <bsd.compat.pre.mk>
 
diff --git a/share/mk/bsd.compat.pre.mk b/share/mk/bsd.compat.pre.mk
index 05bdcb8a9f4..92ff6013c04 100644
--- a/share/mk/bsd.compat.pre.mk
+++ b/share/mk/bsd.compat.pre.mk
@@ -1,5 +1,5 @@
 .if !targets(__<${_this:T}>__)
-__<${_this:T}>__:
+__<${_this:T}>__:	.NOTMAIN
 
 _ALL_LIBCOMPATS:=	32
 
diff --git a/share/mk/bsd.compiler.mk b/share/mk/bsd.compiler.mk
index f93d3495b1a..e8d48cf0b5b 100644
--- a/share/mk/bsd.compiler.mk
+++ b/share/mk/bsd.compiler.mk
@@ -40,7 +40,7 @@
 #
 
 .if !target(__<bsd.compiler.mk>__)
-__<bsd.compiler.mk>__:
+__<bsd.compiler.mk>__:	.NOTMAIN
 
 .include <bsd.opts.mk>
 
diff --git a/share/mk/bsd.confs.mk b/share/mk/bsd.confs.mk
index c4fb62782b7..ea702cece28 100644
--- a/share/mk/bsd.confs.mk
+++ b/share/mk/bsd.confs.mk
@@ -8,7 +8,7 @@
 .    error bsd.dirs.mk must be included after bsd.confs.mk.
 .  endif
 
-__<bsd.confs.mk>__:
+__<bsd.confs.mk>__:	.NOTMAIN
 
 CONFGROUPS?=	CONFS
 
diff --git a/share/mk/bsd.dirs.mk b/share/mk/bsd.dirs.mk
index 8e090d3f2cb..317ff61cd60 100644
--- a/share/mk/bsd.dirs.mk
+++ b/share/mk/bsd.dirs.mk
@@ -2,7 +2,7 @@
 # Directory permissions management.
 
 .if !target(__<bsd.dirs.mk>__)
-__<bsd.dirs.mk>__:
+__<bsd.dirs.mk>__:	.NOTMAIN
 # List of directory variable names to install.  Each variable name's value
 # must be a full path.  If non-default permissions are desired, <DIR>_MODE,
 # <DIR>_OWN, and <DIR>_GRP may be specified.
diff --git a/share/mk/bsd.files.mk b/share/mk/bsd.files.mk
index a330a8dddbb..aedc414d6a2 100644
--- a/share/mk/bsd.files.mk
+++ b/share/mk/bsd.files.mk
@@ -8,7 +8,7 @@
 .error bsd.dirs.mk must be included after bsd.files.mk.
 .endif
 
-__<bsd.files.mk>__:
+__<bsd.files.mk>__:	.NOTMAIN
 
 FILESGROUPS?=	FILES
 
diff --git a/share/mk/bsd.init.mk b/share/mk/bsd.init.mk
index 64fdd23ce7a..4d3acc3a114 100644
--- a/share/mk/bsd.init.mk
+++ b/share/mk/bsd.init.mk
@@ -6,7 +6,7 @@
 # MK_FOO variables.
 
 .if !target(__<bsd.init.mk>__)
-__<bsd.init.mk>__:
+__<bsd.init.mk>__:	.NOTMAIN
 .include <bsd.opts.mk>
 .-include "local.init.mk"
 
diff --git a/share/mk/bsd.lib.mk b/share/mk/bsd.lib.mk
index d6e271ce0a0..b33366604b4 100644
--- a/share/mk/bsd.lib.mk
+++ b/share/mk/bsd.lib.mk
@@ -4,7 +4,7 @@
 .include <bsd.linker.mk>
 .include <bsd.compat.pre.mk>
 
-__<bsd.lib.mk>__:
+__<bsd.lib.mk>__:	.NOTMAIN
 
 .if defined(LIB_CXX) || defined(SHLIB_CXX)
 _LD=	${CXX}
diff --git a/share/mk/bsd.linker.mk b/share/mk/bsd.linker.mk
index cceeadd05b9..95d98231b64 100644
--- a/share/mk/bsd.linker.mk
+++ b/share/mk/bsd.linker.mk
@@ -25,7 +25,7 @@
 #
 
 .if !target(__<bsd.linker.mk>__)
-__<bsd.linker.mk>__:
+__<bsd.linker.mk>__:	.NOTMAIN
 
 _ld_vars=LD $${_empty_var_}
 .if !empty(_WANT_TOOLCHAIN_CROSS_VARS)
diff --git a/share/mk/bsd.obj.mk b/share/mk/bsd.obj.mk
index 578423914c6..91dac6805b1 100644
--- a/share/mk/bsd.obj.mk
+++ b/share/mk/bsd.obj.mk
@@ -38,7 +38,7 @@
 #
 
 .if !target(__<bsd.obj.mk>__)
-__<bsd.obj.mk>__:
+__<bsd.obj.mk>__:	.NOTMAIN
 .include <bsd.own.mk>
 
 # This is also done in bsd.init.mk
diff --git a/share/mk/bsd.opts.mk b/share/mk/bsd.opts.mk
index f79c5bc61a2..a9400186f78 100644
--- a/share/mk/bsd.opts.mk
+++ b/share/mk/bsd.opts.mk
@@ -30,7 +30,7 @@
 #
 
 .if !target(__<bsd.opts.mk>__)
-__<bsd.opts.mk>__:
+__<bsd.opts.mk>__:	.NOTMAIN
 
 .if !defined(_WITHOUT_SRCCONF)
 #
diff --git a/share/mk/bsd.own.mk b/share/mk/bsd.own.mk
index bc53f3679e7..0c47ba9af5c 100644
--- a/share/mk/bsd.own.mk
+++ b/share/mk/bsd.own.mk
@@ -146,7 +146,7 @@
 # SYMLINKMODE	Symbolic link mode [755]
 
 .if !target(__<bsd.own.mk>__)
-__<bsd.own.mk>__:
+__<bsd.own.mk>__:	.NOTMAIN
 
 .include <bsd.opts.mk>		# options now here or src.opts.mk
 
diff --git a/share/mk/bsd.subdir.mk b/share/mk/bsd.subdir.mk
index 565af41602c..cf19c9d6620 100644
--- a/share/mk/bsd.subdir.mk
+++ b/share/mk/bsd.subdir.mk
@@ -33,7 +33,7 @@
 #
 
 .if !target(__<bsd.subdir.mk>__)
-__<bsd.subdir.mk>__:
+__<bsd.subdir.mk>__:	.NOTMAIN
 
 .if ${MK_AUTO_OBJ} == "no"
 _obj=	obj
diff --git a/share/mk/bsd.symver.mk b/share/mk/bsd.symver.mk
index d0b63206d8f..7a46f67e677 100644
--- a/share/mk/bsd.symver.mk
+++ b/share/mk/bsd.symver.mk
@@ -1,6 +1,6 @@
 
 .if !target(__<bsd.symver.mk>__)
-__<bsd.symver.mk>__:
+__<bsd.symver.mk>__:	.NOTMAIN
 
 .include <bsd.init.mk>
 
diff --git a/share/mk/bsd.test.mk b/share/mk/bsd.test.mk
index ea7bda0da55..b324ac17333 100644
--- a/share/mk/bsd.test.mk
+++ b/share/mk/bsd.test.mk
@@ -7,7 +7,7 @@
 
 .include <bsd.init.mk>
 
-__<bsd.test.mk>__:
+__<bsd.test.mk>__:	.NOTMAIN
 
 # Third-party software (kyua, etc) prefix.
 LOCALBASE?=	/usr/local
diff --git a/share/mk/local.dirdeps.mk b/share/mk/local.dirdeps.mk
index 2a92eea7455..f34a4542e53 100644
--- a/share/mk/local.dirdeps.mk
+++ b/share/mk/local.dirdeps.mk
@@ -40,7 +40,7 @@ DIRDEPS_FILTER.host = \
 # since they are never installed.
 
 # Cheat for including src.libnames.mk
-__<bsd.init.mk>__:
+__<bsd.init.mk>__:	.NOTMAIN
 # Pull in _INTERNALLIBS
 .include <src.libnames.mk>
 
diff --git a/share/mk/local.init.mk b/share/mk/local.init.mk
index 758a3604d73..7ea513385f6 100644
--- a/share/mk/local.init.mk
+++ b/share/mk/local.init.mk
@@ -1,6 +1,6 @@
 
 .if !target(__${_this}__)
-__${_this}__:
+__${_this}__:	.NOTMAIN
 
 .if ${.MAKE.MODE:Mmeta*} != ""
 .if !empty(SUBDIR) && !defined(LIB) && !defined(PROG) && ${.MAKE.MAKEFILES:M*bsd.prog.mk} == ""
diff --git a/share/mk/netbsd-tests.test.mk b/share/mk/netbsd-tests.test.mk
index 4f222faca2a..bed01156c5e 100644
--- a/share/mk/netbsd-tests.test.mk
+++ b/share/mk/netbsd-tests.test.mk
@@ -1,6 +1,6 @@
 
 .if !target(__netbsd_tests.test.mk__)
-__netbsd_tests.test.mk__:
+__netbsd_tests.test.mk__:	.NOTMAIN
 
 TESTSRC?=	${SRCTOP}/contrib/netbsd-tests/${RELDIR:H}
 
diff --git a/share/mk/src.init.mk b/share/mk/src.init.mk
index e35d615d0e1..01ea5437e5a 100644
--- a/share/mk/src.init.mk
+++ b/share/mk/src.init.mk
@@ -1,6 +1,6 @@
 
 .if !target(__<src.init.mk>__)
-__<src.init.mk>__:
+__<src.init.mk>__:	.NOTMAIN
 
 .if !target(buildenv)
 buildenv: .PHONY
diff --git a/share/mk/src.libnames.mk b/share/mk/src.libnames.mk
index be8db2dc154..57b694ed512 100644
--- a/share/mk/src.libnames.mk
+++ b/share/mk/src.libnames.mk
@@ -7,7 +7,7 @@
 .endif
 
 .if !target(__<src.libnames.mk>__)
-__<src.libnames.mk>__:
+__<src.libnames.mk>__:	.NOTMAIN
 
 .include <src.opts.mk>
 
diff --git a/share/mk/src.lua.mk b/share/mk/src.lua.mk
index 7d8bc05fdfc..063ca97ea7d 100644
--- a/share/mk/src.lua.mk
+++ b/share/mk/src.lua.mk
@@ -5,7 +5,7 @@
 # system.
 
 .if !target(__<src.lua.mk>__)
-__<src.lua.mk>__:
+__<src.lua.mk>__:	.NOTMAIN
 
 .include <bsd.own.mk>
 
diff --git a/share/mk/src.opts.mk b/share/mk/src.opts.mk
index ef8711db713..956220be43b 100644
--- a/share/mk/src.opts.mk
+++ b/share/mk/src.opts.mk
@@ -29,7 +29,7 @@
 #
 
 .if !target(__<src.opts.mk>__)
-__<src.opts.mk>__:
+__<src.opts.mk>__:	.NOTMAIN
 
 .include <bsd.own.mk>
 
diff --git a/share/mk/src.tools.mk b/share/mk/src.tools.mk
index 23012593222..70053c9b4a3 100644
--- a/share/mk/src.tools.mk
+++ b/share/mk/src.tools.mk
@@ -21,5 +21,5 @@ SERVICES_MKDB_CMD?=	services_mkdb
 CAP_MKDB_CMD?=	cap_mkdb
 TIC_CMD?=	tic
 
-__<src.tools.mk>__:
+__<src.tools.mk>__:	.NOTMAIN
 .endif  # !target(__<tools>__)