{...}: {
  programs.ssh = {
    enable = true;
    enableDefaultConfig = false;
    matchBlocks = {
      "*" = {
        addKeysToAgent = "yes";
        forwardAgent = false;
      };
      "cgit" = {
        user = "git";
        hostname = "100.76.17.20";
        identityFile = "~/.ssh/cgit";
      };
      "codeberg" = {
        user = "git";
        hostname = "codeberg.org";
        identityFile = "~/.ssh/codeberg";
      };
      "poseidon" = {
        user = "admin";
        hostname = "81.2.236.202";
        identityFile = "/mnt/ssh-keys/poseidon";
      };
    };
  };
}