Set hostname and hostId

modules/networking.nix

@@ -3,14 +3,14 @@
 {
   # Assign a static IP
   networking = {
-    hostName = "unit";
+    hostname = "unit";
     hostId = "737d82f4";
     interfaces.eth0 = {
       useDHCP = false;
-      ipv4.addresses = [{
+      addresses = {
         address = "10.0.1.3";
         prefixLength = 24;
-      }];
+      };
     };
     defaultGateway = {
       address = "10.0.1.1";