{ ... }: {
  programs = {
    ssh = {
      enable = true;
      compression = true;
      addKeysToAgent = "yes";
      serverAliveCountMax = 2;
      serverAliveInterval = 10;
      hashKnownHosts = true;
      matchBlocks = {
        "git" = {
          port = 2020;
          identityFile = "/home/don/.ssh/git";
        };
        "git.trex-halfbeak.ts.net" = { identityFile = "/home/don/.ssh/git"; };
        "github.com" = { identityFile = "/home/don/.ssh/git"; };
        "gitlab.com" = { identityFile = "/home/don/.ssh/git"; };
        "homeassistant.home.duckland.org" = { user = "root"; };
        "dreamhost" = {
          user = "duck";
          hostname = "wise.dreamhost.com";
        };
      };
      extraConfig = ''
        ConnectTimeout 5
      '';
    };
  };
}