{
  programs.ssh = {
    enable = true;
    compression = true;
    matchBlocks = {
      "gitlab.com" = {
        hostname = "gitlab.com";
        identityFile = "~/.ssh/gitlab";
        identitiesOnly = true;
      };
      "github.com" = {
        hostname = "github.com";
        identityFile = "~/.ssh/github";
        identitiesOnly = true;
      };
      "bitbucket.com" = {
        hostname = "bitbucket.com";
        identityFile = "~/.ssh/bitbucket";
        identitiesOnly = true;
      };
      "aur.archlinux.org" = {
        hostname = "aur.archlinux.org";
        identityFile = "~/.ssh/aur";
        identitiesOnly = true;
      };
      "heroku.com" = {
        hostname = "heroku.com";
        identityFile = "~/.ssh/heroku";
        identitiesOnly = true;
      };
      "ngrok.io" = {
  			hostname = "ngrok.io";
  			identityFile = "~/.ssh/local";
  			identitiesOnly = true;
      };
      "172.27.108.?" = {
  			hostname = "172.27.108.?";
  			identityFile = "~/.ssh/local";
  			identitiesOnly = true;
      };
      "*" = {
    		identityFile = "~/.ssh/id_ed25519";
      };
    };
  };
}