diff --git a/devel/pth/Makefile b/devel/pth/Makefile
index a844734b6590..5ed43b6bed95 100644
--- a/devel/pth/Makefile
+++ b/devel/pth/Makefile
@@ -15,6 +15,8 @@ PKGNAMESUFFIX?=	# empty
 MAINTAINER=	vd@FreeBSD.org
 COMMENT=	GNU Portable Threads
 
+MAKE_JOBS_UNSAFE=	yes
+
 USE_LDCONFIG=	${PREFIX}/lib/pth
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--enable-optimize \
diff --git a/editors/vim/Makefile b/editors/vim/Makefile
index 7bc5945cd606..97461e96f71c 100644
--- a/editors/vim/Makefile
+++ b/editors/vim/Makefile
@@ -30,6 +30,8 @@ PATCHFILES:=	${PATCHFILES:N7.2.${p}}
 MAINTAINER?=	obrien@FreeBSD.org
 COMMENT?=	Vi "workalike", with many additional features
 
+MAKE_JOBS_UNSAFE=	yes
+
 SLAVEDIRS=	editors/vim-lite
 
 .if defined(WITH_OPTIONS) || defined(WITH_VIM_OPTIONS)
diff --git a/mail/procmail/Makefile b/mail/procmail/Makefile
index a177d0b4c584..bd368782d98e 100644
--- a/mail/procmail/Makefile
+++ b/mail/procmail/Makefile
@@ -25,6 +25,8 @@ MASTER_SITES=	ftp://ftp.procmail.org/pub/procmail/ \
 MAINTAINER=	ache@FreeBSD.org
 COMMENT=	A local mail delivery agent
 
+MAKE_JOBS_UNSAFE=	yes
+
 #.if defined(WITH_COURIER_MAILDIR_KLUDGE)
 #PATCH_SITES=	http://www.john.net.au/pub/procmail-courier/
 #PATCHFILES=	procmail-authenticate.c-userMaildir.patch
diff --git a/net-mgmt/nagios/Makefile b/net-mgmt/nagios/Makefile
index b21bfe40654c..6821be1bd620 100644
--- a/net-mgmt/nagios/Makefile
+++ b/net-mgmt/nagios/Makefile
@@ -16,6 +16,8 @@ COMMENT=	Extremely powerful network monitoring system
 LIB_DEPENDS=	gd.4:${PORTSDIR}/graphics/gd
 RUN_DEPENDS=	${LOCALBASE}/libexec/nagios/check_nagios:${PORTSDIR}/net-mgmt/nagios-plugins
 
+MAKE_JOBS_UNSAFE=	yes
+
 USE_ICONV=	yes
 USE_PERL5_BUILD=	yes
 USE_AUTOTOOLS=	autoconf:262 libltdl:15
diff --git a/net-mgmt/net-snmp-devel/Makefile b/net-mgmt/net-snmp-devel/Makefile
index 226f4b0a7026..b458a52c5402 100644
--- a/net-mgmt/net-snmp-devel/Makefile
+++ b/net-mgmt/net-snmp-devel/Makefile
@@ -25,6 +25,8 @@ EXTRA_PATCHES+=	${PATCHDIR}/extra-patch-local:Makefile.in
 RUN_DEPEND=	${SITE_PERL}/${PERL_ARCH}/Tk.pm:${PORTSDIR}/x11-toolkits/p5-Tk
 .endif
 
+MAKE_JOBS_UNSAFE=	yes
+
 GNU_CONFIGURE=	yes
 USE_RC_SUBR=	snmpd.sh snmptrapd.sh
 USE_OPENSSL=	yes
diff --git a/net-mgmt/net-snmp/Makefile b/net-mgmt/net-snmp/Makefile
index 226f4b0a7026..b458a52c5402 100644
--- a/net-mgmt/net-snmp/Makefile
+++ b/net-mgmt/net-snmp/Makefile
@@ -25,6 +25,8 @@ EXTRA_PATCHES+=	${PATCHDIR}/extra-patch-local:Makefile.in
 RUN_DEPEND=	${SITE_PERL}/${PERL_ARCH}/Tk.pm:${PORTSDIR}/x11-toolkits/p5-Tk
 .endif
 
+MAKE_JOBS_UNSAFE=	yes
+
 GNU_CONFIGURE=	yes
 USE_RC_SUBR=	snmpd.sh snmptrapd.sh
 USE_OPENSSL=	yes