NixOS: "Failed to obtain geohash. Lookup ip-api.com on [::1]:53 connection refused"

[V3ntus]

The systemd service is not able to resolve the geohash API host. Oddly it's pointing to localhost to try and resolve it. resolveconf.service is enabled and active. There are valid nameservers in /etc/resolv.conf. I can dig ip-api.com just fine. Here's the systemd status for endlessh-go:

● endlessh-go.service - SSH tarpit
     Loaded: loaded (/etc/systemd/system/endlessh-go.service; enabled; preset: enabled)
     Active: active (running) since Thu 2024-05-02 15:22:11 UTC; 54min ago
   Main PID: 271204 (endlessh-go)
         IP: 170.9K in, 533.3K out
         IO: 6.3M read, 0B written
      Tasks: 5 (limit: 1152)
     Memory: 11.4M
        CPU: 884ms
     CGroup: /system.slice/endlessh-go.service
             └─271204 /nix/store/i4kqp7h5n5j2avwj6gjjjihhg6axxxqz-endlessh-go-20230625-3/bin/endlessh-go -logtostderr -host=x.x.x.x -port=22 -enable_prometheus -prometheus_host=x.x.x.x -prometheus_port=2112 -geoip_supplier=ip-api

May 02 16:06:01 nixos endlessh-go[271204]: W0502 16:06:01.326615  271204 client.go:60] Failed to obatin the geohash of 218.92.0.97: Get "http://ip-api.com/json/218.92.0.97": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:34947->[::1]:53: read: connection refused.
May 02 16:11:30 nixos endlessh-go[271204]: W0502 16:11:30.645957  271204 client.go:60] Failed to obatin the geohash of 180.101.88.196: Get "http://ip-api.com/json/180.101.88.196": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:34406->[::1]:53: read: connection refused.
May 02 16:11:57 nixos endlessh-go[271204]: W0502 16:11:57.753493  271204 client.go:60] Failed to obatin the geohash of 218.92.0.96: Get "http://ip-api.com/json/218.92.0.96": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:53675->[::1]:53: read: connection refused.
May 02 16:12:19 nixos endlessh-go[271204]: W0502 16:12:19.649602  271204 client.go:60] Failed to obatin the geohash of 218.92.0.113: Get "http://ip-api.com/json/218.92.0.113": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:50887->[::1]:53: read: connection refused.
May 02 16:12:50 nixos endlessh-go[271204]: W0502 16:12:50.385315  271204 client.go:60] Failed to obatin the geohash of 94.203.171.157: Get "http://ip-api.com/json/94.203.171.157": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:46093->[::1]:53: read: connection refused.
May 02 16:13:07 nixos endlessh-go[271204]: W0502 16:13:07.635677  271204 client.go:60] Failed to obatin the geohash of 183.129.208.82: Get "http://ip-api.com/json/183.129.208.82": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:47188->[::1]:53: read: connection refused.
May 02 16:13:12 nixos endlessh-go[271204]: W0502 16:13:12.766532  271204 client.go:60] Failed to obatin the geohash of 121.135.254.129: Get "http://ip-api.com/json/121.135.254.129": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:39893->[::1]:53: read: connection refused.
May 02 16:13:22 nixos endlessh-go[271204]: W0502 16:13:22.202812  271204 client.go:60] Failed to obatin the geohash of 218.92.0.96: Get "http://ip-api.com/json/218.92.0.96": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:41506->[::1]:53: read: connection refused.
May 02 16:14:44 nixos endlessh-go[271204]: W0502 16:14:44.648870  271204 client.go:60] Failed to obatin the geohash of 218.92.0.96: Get "http://ip-api.com/json/218.92.0.96": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:45123->[::1]:53: read: connection refused.
May 02 16:16:06 nixos endlessh-go[271204]: W0502 16:16:06.965790  271204 client.go:60] Failed to obatin the geohash of 218.92.0.96: Get "http://ip-api.com/json/218.92.0.96": dial tcp: lookup ip-api.com on [::1]:53: read udp [::1]:45047->[::1]:53: read: connection refused.

Running on NixOS 23.11. Relevant config:

services.endlessh-go = {
  enable = true;
  listenAddress = "<PUBLIC IP>";
  port = 22;
  prometheus = {
    enable = true;
    listenAddress = "<VPN IP>";
  };
  extraOptions = [
    "-geoip_supplier=ip-api"
  ];
};