diff -Nru ifupdown-0.8.36+nmu1ubuntu3/debian/if-down.d/resolved ifupdown-new/debian/if-down.d/resolved
--- ifupdown-0.8.36+nmu1ubuntu3/debian/if-down.d/resolved	2020-07-28 10:55:18.000000000 +0100
+++ ifupdown-new/debian/if-down.d/resolved	2022-10-11 17:23:11.715870100 +0100
@@ -9,7 +9,6 @@
 esac            
 
 if systemctl is-enabled systemd-resolved > /dev/null 2>&1; then
-    mystatedir statedir ifindex interface
     interface=$IFACE
     if [ ! "$interface" ]; then
         return
diff -Nru ifupdown-0.8.36+nmu1ubuntu3/debian/if-up.d/resolved ifupdown-new/debian/if-up.d/resolved
--- ifupdown-0.8.36+nmu1ubuntu3/debian/if-up.d/resolved	2022-04-17 22:21:44.000000000 +0100
+++ ifupdown-new/debian/if-up.d/resolved	2022-10-11 17:22:02.665870100 +0100
@@ -9,7 +9,6 @@
 esac            
 
 if systemctl is-enabled systemd-resolved > /dev/null 2>&1; then
-    mystatedir statedir ifindex interface
 
     interface=$IFACE
     if [ ! "$interface" ]; then
@@ -37,19 +36,19 @@
     NEW_DEFAULT_ROUTE=$IF_DNS_DEFAULT_ROUTE
     NEW_DNS=$(echo $IF_DNS_NAMESERVERS $IF_DNS_NAMESERVER)
     NEW_DOMAINS=$(echo $IF_DNS_DOMAIN $IF_DNS_SEARCH)
-    DNS=DNS
-    DOMAINS=DOMAINS
+    dns_varname=DNS
+    domains_varname=DOMAINS
     if [ "$ADDRFAM" = "inet6" ]; then
-        DNS=DNS6
-        DOMAINS=DOMAINS6
+        dns_varname=DNS6
+        domains_varname=DOMAINS6
     fi
     if  [ -n "$NEW_DNS" ]; then
         cat <<EOF >"$mystatedir/ifupdown-${ADDRFAM}-$interface"
-"$DNS"="$NEW_DNS"
+$dns_varname="$NEW_DNS"
 EOF
         if  [ -n "$NEW_DOMAINS" ]; then
             cat <<EOF >>"$mystatedir/ifupdown-${ADDRFAM}-$interface"
-"$DOMAINS"="$NEW_DOMAINS"
+$domains_varname="$NEW_DOMAINS"
 EOF
         fi
     fi
@@ -68,7 +67,6 @@
     # ignore errors due to nonexistent file
     md5sum "$mystatedir/isc-dhcp-v4-$interface" "$mystatedir/isc-dhcp-v6-$interface" "$mystatedir/ifupdown-inet-$interface" "$mystatedir/ifupdown-inet6-$interface" > "$newstate" 2> /dev/null || true
     if ! cmp --silent "$oldstate" "$newstate" 2>/dev/null; then
-        DNS DNS6 DOMAINS DOMAINS6 DEFAULT_ROUTE
         # v4 first
         if [ -e "$mystatedir/isc-dhcp-v4-$interface" ]; then
             . "$mystatedir/isc-dhcp-v4-$interface"