diff --git a/src/disk.sh b/src/disk.sh
index bcca214..b520587 100644
--- a/src/disk.sh
+++ b/src/disk.sh
@@ -80,7 +80,7 @@ getSize() {
 isCow() {
   local FS=$1
 
-  if [[ "${FS,,}" == "xfs" || "${FS,,}" == "zfs" || "${FS,,}" == "btrfs" || "${FS,,}" == "bcachefs" ]]; then
+  if [[ "${FS,,}" == "xfs" || "${FS,,}" == "btrfs" || "${FS,,}" == "bcachefs" ]]; then
     return 0
   fi
 
diff --git a/src/display.sh b/src/display.sh
index be5fb9c..2eeaccf 100644
--- a/src/display.sh
+++ b/src/display.sh
@@ -15,9 +15,8 @@ if [[ "$GPU" != [Yy1]* ]] || [[ "$ARCH" != "amd64" ]]; then
 
 fi
 
-[[ "${VGA,,}" == "virtio" ]] && VGA="virtio-vga"
 DISPLAY_OPTS="-display egl-headless,rendernode=/dev/dri/renderD128"
-DISPLAY_OPTS="$DISPLAY_OPTS -vga none -device $VGA"
+DISPLAY_OPTS="$DISPLAY_OPTS -vga $VGA"
 
 [ ! -d /dev/dri ] && mkdir -m 755 /dev/dri
 
diff --git a/src/install.sh b/src/install.sh
index 3e928e1..041c1ff 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -265,7 +265,7 @@ if ! touch "$SYSTEM"; then
   error "Could not create file $SYSTEM for the system disk." && exit 98
 fi
 
-if [[ "${FS,,}" == "xfs" || "${FS,,}" == "zfs" || "${FS,,}" == "btrfs" || "${FS,,}" == "bcachefs" ]]; then
+if [[ "${FS,,}" == "xfs" || "${FS,,}" == "btrfs" || "${FS,,}" == "bcachefs" ]]; then
   { chattr +C "$SYSTEM"; } || :
   FA=$(lsattr "$SYSTEM")
   if [[ "$FA" != *"C"* ]]; then
diff --git a/src/network.sh b/src/network.sh
index c9ce3f9..d6b5337 100644
--- a/src/network.sh
+++ b/src/network.sh
@@ -117,7 +117,6 @@ configureNAT() {
   # Create a bridge with a static IP for the VM guest
 
   VM_NET_IP='20.20.20.21'
-  [[ "$DEBUG" == [Yy1]* ]] && set -x
 
   { ip link add dev dockerbridge type bridge ; rc=$?; } || :
 
@@ -155,9 +154,6 @@ configureNAT() {
     iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill || true
   fi
 
-  { set +x; } 2>/dev/null
-  [[ "$DEBUG" == [Yy1]* ]] && echo
-
   NET_OPTS="-netdev tap,ifname=$VM_NET_TAP,script=no,downscript=no,id=hostnet0"
 
   { exec 40>>/dev/vhost-net; rc=$?; } 2>/dev/null || :
@@ -249,7 +245,7 @@ html "Initializing network..."
 
 if [[ "$DEBUG" == [Yy1]* ]]; then
   info "Host: $HOST  IP: $IP  Gateway: $GATEWAY  Interface: $VM_NET_DEV  MAC: $VM_NET_MAC"
-  [ -f /etc/resolv.conf ] && cat /etc/resolv.conf 
+  [ -f /etc/resolv.conf ] && grep '^nameserver*' /etc/resolv.conf
   echo
 fi