diff --git a/debian/control b/debian/control
index ac701a2d6..d84c121c8 100644
--- a/debian/control
+++ b/debian/control
@@ -51,7 +51,8 @@ Vcs-Browser: http://svn.debian.org/wsvn/pkg-voip/kamailio/?op=log
 Package: ngcp-kamailio
 Architecture: any
 Multi-Arch: foreign
-Pre-Depends: ${misc:Pre-Depends}
+Pre-Depends: ngcp-system-tools,
+             ${misc:Pre-Depends}
 Depends: adduser,
          python,
          ${misc:Depends},
diff --git a/debian/kamailio-lb.init b/debian/kamailio-lb.init
index 85bbd2539..1781c84bc 100644
--- a/debian/kamailio-lb.init
+++ b/debian/kamailio-lb.init
@@ -112,16 +112,20 @@ PKG_MEMORY=$((`echo $PKG_MEMORY | sed -e 's/[^0-9]//g'`))
 [ -z "$USER" ]  && USER=kamailio
 [ -z "$GROUP" ] && GROUP=kamailio
 
-if test "$DUMP_CORE" = "yes" ; then
-    # set proper ulimit
-    ulimit -c unlimited
-fi
+if /usr/sbin/ngcp-virt-identify --type container; then
+  echo "container environment detected. Skip ulimit commands"
+else
+  if test "$DUMP_CORE" = "yes" ; then
+      # set proper ulimit
+      ulimit -c unlimited
+  fi
 
-# raise memlock limit, otherwise mysql client fails to initialize
-ulimit -l unlimited
-# raise file descriptors limit, otherwise we get "Can't send
-# command to RTP proxy" on massive number of calls with RTP
-ulimit -n 16384
+  # raise memlock limit, otherwise mysql client fails to initialize
+  ulimit -l unlimited
+  # raise file descriptors limit, otherwise we get "Can't send
+  # command to RTP proxy" on massive number of calls with RTP
+  ulimit -n 16384
+fi
 
 if [ "$SSD_SUID" != "yes" ]; then
   OPTIONS="-f $CFGFILE -P $PIDFILE -m $SHM_MEMORY -M $PKG_MEMORY -u $USER -g $GROUP"
diff --git a/debian/kamailio-proxy.init b/debian/kamailio-proxy.init
index 7682f681b..8cb86904d 100644
--- a/debian/kamailio-proxy.init
+++ b/debian/kamailio-proxy.init
@@ -114,16 +114,20 @@ PKG_MEMORY=$((`echo $PKG_MEMORY | sed -e 's/[^0-9]//g'`))
 [ -z "$GROUP" ] && GROUP=kamailio
 
 
-if test "$DUMP_CORE" = "yes" ; then
-    # set proper ulimit
-    ulimit -c unlimited
-fi
+if /usr/sbin/ngcp-virt-identify --type container; then
+  echo "container environment detected. Skip ulimit commands"
+else
+  if test "$DUMP_CORE" = "yes" ; then
+      # set proper ulimit
+      ulimit -c unlimited
+  fi
 
-# raise memlock limit, otherwise mysql client fails to initialize
-ulimit -l unlimited
-# raise file descriptors limit, otherwise we get "Can't send
-# command to RTP proxy" on massive number of calls with RTP
-ulimit -n 16384
+  # raise memlock limit, otherwise mysql client fails to initialize
+  ulimit -l unlimited
+  # raise file descriptors limit, otherwise we get "Can't send
+  # command to RTP proxy" on massive number of calls with RTP
+  ulimit -n 16384
+fi
 
 if [ "$SSD_SUID" != "yes" ]; then
   OPTIONS="-f $CFGFILE -P $PIDFILE -m $SHM_MEMORY -M $PKG_MEMORY -u $USER -g $GROUP"