diff --git a/debian/ngcp-rtpengine-daemon.init b/debian/ngcp-rtpengine-daemon.init
index 48b4dc5aa..13f8b78ca 100755
--- a/debian/ngcp-rtpengine-daemon.init
+++ b/debian/ngcp-rtpengine-daemon.init
@@ -67,6 +67,12 @@ if test "$FORK" = "no" ; then
 	OPTIONS="$OPTIONS --foreground"
 fi
 
+if [ -x /usr/sbin/ngcp-virt-identify ]; then
+	if /usr/sbin/ngcp-virt-identify --type container; then
+		VIRT="yes"
+	fi
+fi
+
 case "$1" in
   start)
 	set +e
@@ -84,7 +90,7 @@ case "$1" in
 	  esac
 	fi
 	echo -n "Starting $DESC: $NAME"
-	if [ $TABLE -ge 0 ] && ! /usr/sbin/ngcp-virt-identify --type container; then
+	if [ $TABLE -ge 0 ] && [ "$VIRT" != "yes" ]; then
 		set +e
 		modprobe xt_MEDIAPROXY
 		if [ -e /proc/mediaproxy/control ]; then
@@ -113,7 +119,7 @@ case "$1" in
 	if [ "$?" -ne 0 ]; then
 		return $?
 	fi
-	if [ $TABLE -ge 0 ] && ! /usr/sbin/ngcp-virt-identify --type container; then
+	if [ $TABLE -ge 0 ] && [ "$VIRT" != "yes" ]; then
 		set +e
 		if [ -e /proc/mediaproxy/control ]; then
 			echo "del $TABLE" > /proc/mediaproxy/control 2>/dev/null
@@ -150,7 +156,7 @@ case "$1" in
 	      ;;
 	  esac
 	fi
-	if [ $TABLE -ge 0 ] && ! /usr/sbin/ngcp-virt-identify --type container; then
+	if [ $TABLE -ge 0 ] && [ "$VIRT" != "yes" ]; then
 		sleep 1
 		set +e
 		if [ -e /proc/mediaproxy/control ]; then
diff --git a/debian/ngcp-rtpengine-kernel-dkms.postinst b/debian/ngcp-rtpengine-kernel-dkms.postinst
index 021c589d0..7c2f80375 100644
--- a/debian/ngcp-rtpengine-kernel-dkms.postinst
+++ b/debian/ngcp-rtpengine-kernel-dkms.postinst
@@ -8,7 +8,14 @@ name=ngcp-rtpengine
 version=`dpkg-query -W -f='${Version}' "$package" \
 		|rev|cut -d- -f2-|rev|cut -d':' -f2|tr -d "\n"`
 
-if /usr/sbin/ngcp-virt-identify --type container; then
+
+if [ -x /usr/sbin/ngcp-virt-identify ]; then
+	if /usr/sbin/ngcp-virt-identify --type container; then
+		VIRT="yes"
+	fi
+fi
+
+if [ "$VIRT" = "yes" ]; then
 	echo "Container environment detected. Skip dkms"
 else
 	isadded=`dkms status -m "$name" -v "$version"`
diff --git a/debian/ngcp-rtpengine-kernel-dkms.prerm b/debian/ngcp-rtpengine-kernel-dkms.prerm
index 130c1b223..c6df3c03c 100644
--- a/debian/ngcp-rtpengine-kernel-dkms.prerm
+++ b/debian/ngcp-rtpengine-kernel-dkms.prerm
@@ -8,12 +8,18 @@ name=ngcp-rtpengine
 version=`dpkg-query -W -f='${Version}' "$package" \
         |rev|cut -d- -f2-|rev|cut -d':' -f2|tr -d "\n"`
 
+if [ -x /usr/sbin/ngcp-virt-identify ]; then
+	if /usr/sbin/ngcp-virt-identify --type container; then
+		VIRT="yes"
+	fi
+fi
+
 # make sure it's not running
 if [ -x /etc/init.d/ngcp-rtpengine-daemon ] ; then
 	invoke-rc.d ngcp-rtpengine-daemon stop || true
 fi
 
-if /usr/sbin/ngcp-virt-identify --type container; then
+if [ "$VIRT" = "yes" ]; then
 	echo "Container environment detected. Skip dkms"
 else
 	dkms remove -m "$name" -v "$version" --all || true