diff --git a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.22.ebuild b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.22.ebuild
index 5983c8110cb55..2883363f9e667 100644
--- a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.22.ebuild
+++ b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.22.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2018 Gentoo Authors
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -49,6 +49,7 @@ BUILD_TARGET_ARCH="${ARCH}"
 S="${WORKDIR}/${MY_P}"
 
 pkg_setup() {
+	export DISTCC_DISABLE=1 #674256
 	MODULE_NAMES="vboxguest(misc:${WORKDIR}/vboxguest:${WORKDIR}/vboxguest)
 		vboxsf(misc:${WORKDIR}/vboxsf:${WORKDIR}/vboxsf)"
 	use X && MODULE_NAMES+=" vboxvideo(misc:${WORKDIR}/vboxvideo::${WORKDIR}/vboxvideo)"
diff --git a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.26.ebuild b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.26.ebuild
index 33e1e37307e5d..90e1cfab7ac5c 100644
--- a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.26.ebuild
+++ b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.26.ebuild
@@ -49,6 +49,7 @@ BUILD_TARGET_ARCH="${ARCH}"
 S="${WORKDIR}/${MY_P}"
 
 pkg_setup() {
+	export DISTCC_DISABLE=1 #674256
 	MODULE_NAMES="vboxguest(misc:${WORKDIR}/vboxguest:${WORKDIR}/vboxguest)
 		vboxsf(misc:${WORKDIR}/vboxsf:${WORKDIR}/vboxsf)"
 	use X && MODULE_NAMES+=" vboxvideo(misc:${WORKDIR}/vboxvideo::${WORKDIR}/vboxvideo)"
diff --git a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.28.ebuild b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.28.ebuild
index 5780804c8c4e2..a16a06c6b19af 100644
--- a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.28.ebuild
+++ b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-5.2.28.ebuild
@@ -49,6 +49,7 @@ BUILD_TARGET_ARCH="${ARCH}"
 S="${WORKDIR}/${MY_P}"
 
 pkg_setup() {
+	export DISTCC_DISABLE=1 #674256
 	MODULE_NAMES="vboxguest(misc:${WORKDIR}/vboxguest:${WORKDIR}/vboxguest)
 		vboxsf(misc:${WORKDIR}/vboxsf:${WORKDIR}/vboxsf)"
 	use X && MODULE_NAMES+=" vboxvideo(misc:${WORKDIR}/vboxvideo::${WORKDIR}/vboxvideo)"
diff --git a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.4.ebuild b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.4.ebuild
index 1cda2a1f29f45..fef0ca2c9e44f 100644
--- a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.4.ebuild
+++ b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.4.ebuild
@@ -50,6 +50,7 @@ BUILD_TARGET_ARCH="${ARCH}"
 S="${WORKDIR}/${MY_P}"
 
 pkg_setup() {
+	export DISTCC_DISABLE=1 #674256
 	MODULE_NAMES="vboxguest(misc:${WORKDIR}/vboxguest:${WORKDIR}/vboxguest)
 		vboxsf(misc:${WORKDIR}/vboxsf:${WORKDIR}/vboxsf)"
 	use X && MODULE_NAMES+=" vboxvideo(misc:${WORKDIR}/vboxvideo::${WORKDIR}/vboxvideo)"
diff --git a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.6.ebuild b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.6.ebuild
index 1d942ef517d09..5256fbb5d67c1 100644
--- a/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.6.ebuild
+++ b/app-emulation/virtualbox-guest-additions/virtualbox-guest-additions-6.0.6.ebuild
@@ -50,6 +50,7 @@ BUILD_TARGET_ARCH="${ARCH}"
 S="${WORKDIR}/${MY_P}"
 
 pkg_setup() {
+	export DISTCC_DISABLE=1 #674256
 	MODULE_NAMES="vboxguest(misc:${WORKDIR}/vboxguest:${WORKDIR}/vboxguest)
 		vboxsf(misc:${WORKDIR}/vboxsf:${WORKDIR}/vboxsf)"
 	use X && MODULE_NAMES+=" vboxvideo(misc:${WORKDIR}/vboxvideo::${WORKDIR}/vboxvideo)"