diff --git a/services/monitoring/lgtm/mimir.nix b/services/monitoring/lgtm/mimir.nix
index 1228570..335bd2d 100644
--- a/services/monitoring/lgtm/mimir.nix
+++ b/services/monitoring/lgtm/mimir.nix
@@ -85,14 +85,20 @@ in
       };
     };
 
-    systemd.services.mimir.serviceConfig.EnvironmentFile = [ config.age.secrets.mimir-environment.path ];
+    systemd.services.mimir = {
+      # Mimir tries to determine its own IP address for gossip purposes,
+      # even when it's the only instance, and fails if it can't find one.
+      # Avoid that by ensuring it starts after the network is set up.
+      after = ["network-online.target"];
+      serviceConfig.EnvironmentFile = [ config.age.secrets.mimir-environment.path ];
+    };
 
     services.nginx = {
       upstreams.mimir = {
         servers."127.0.0.1:${toString mimirPort}" = {};
         extraConfig = "keepalive 16;";
       };
-      
+
       virtualHosts."mimir.forkos.org" = {
         enableACME = true;
         forceSSL = true;