nameserver parsing fix

nixos-infect

@@ -84,10 +84,7 @@ EOF
     extraRules1=""
   fi
 
-  nameservers=()
-  while IFS='' read -r line; do
-    nameservers+=("$line")
-  done < <(grep ^nameserver /etc/resolv.conf | cut -f2 -d' ')
+  readarray nameservers < <(grep ^nameserver /etc/resolv.conf | sed -r 's/^nameserver[[:space:]]+([0-9.a-fA-F]+).*/"\1"/')
 
   if [[ "$eth0_name" = eth* ]]; then
     predictable_inames="usePredictableInterfaceNames = lib.mkForce false;"
@@ -99,9 +96,7 @@ EOF
   # This file was populated at runtime with the networking
   # details gathered from the active system.
   networking = {
-    nameservers = [$(for a in "${nameservers[@]}"; do echo -n "
-      $a"; done)
-    ];
+    nameservers = [ ${nameservers[@]} ];
     defaultGateway = "${gateway}";
     defaultGateway6 = "${gateway6}";
     dhcpcd.enable = false;