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-rw-r--r--nixos/lib/build-vms.nix11
1 files changed, 6 insertions, 5 deletions
diff --git a/nixos/lib/build-vms.nix b/nixos/lib/build-vms.nix
index 498c0a377836..50b3b424166b 100644
--- a/nixos/lib/build-vms.nix
+++ b/nixos/lib/build-vms.nix
@@ -48,10 +48,11 @@ rec {
             let
               interfacesNumbered = zipTwoLists config.virtualisation.vlans (range 1 255);
               interfaces = flip map interfacesNumbered ({ first, second }:
-                nameValuePair "eth${toString second}"
-                  { ipAddress = "192.168.${toString first}.${toString m.second}";
-                    subnetMask = "255.255.255.0";
-                  });
+                nameValuePair "eth${toString second}" { ip4 =
+                  [ { address = "192.168.${toString first}.${toString m.second}";
+                      prefixLength = 24;
+                  } ];
+                });
             in
             { key = "ip-address";
               config =
@@ -60,7 +61,7 @@ rec {
                   networking.interfaces = listToAttrs interfaces;
 
                   networking.primaryIPAddress =
-                    optionalString (interfaces != []) (head interfaces).value.ipAddress;
+                    optionalString (interfaces != []) (head (head interfaces).value.ip4).address;
 
                   # Put the IP addresses of all VMs in this machine's
                   # /etc/hosts file.  If a machine has multiple