Failing to generate IPv4 addresses

[GGG-KILLER]

I'm currently using NixOS and have added your repository as a flake input to my system configuration.

When attempting to generate an IP with the latest nixos-unstable, the following error is generated:

$ ipgen --network 192.168.2.0/24 abc
[BUG] failed to parse the generated IP address `c0a8:26b` as IPv4

Relevant parts of flake.lock:

{
  "nodes": {
    "ipgen-cli": {
      "inputs": {
        "advisory-db": "advisory-db",
        "crane": "crane",
        "fenix": "fenix",
        "flake-utils": "flake-utils_2",
        "nixpkgs": [
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1690218106,
        "narHash": "sha256-99E2qNFO5lcoPIG2VEuyIX6hShtkcGfjocAh+GQWh0w=",
        "owner": "ipgen",
        "repo": "cli",
        "rev": "5ebcfbf55af88f10352dfa844e14a05792309a7d",
        "type": "github"
      },
      "original": {
        "owner": "ipgen",
        "repo": "cli",
        "type": "github"
      }
    },
    // ...
    "nixpkgs": {
      "locked": {
        "lastModified": 1751984180,
        "narHash": "sha256-LwWRsENAZJKUdD3SpLluwDmdXY9F45ZEgCb0X+xgOL0=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "9807714d6944a957c2e036f84b0ff8caf9930bc0",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-unstable",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    // ...
  }
}