{ self, ... }: let 
  rev = builtins.replaceStrings ["-dirty"] ["*"] (toString (self.shortRev or self.dirtyShortRev or self.lastModified or "unknown"));
in {
  programs.bash = {
    enable = true;
    shellAliases = {
      ssh-with-yubikey = "ssh_with_yubikey";
    };
    bashrcExtra = ''
      # Load Default .bashrc if non-NixOS
      if [ -e "/etc/skel/.bashrc" ]; then
        source /etc/skel/.bashrc
      fi

      # Helper Functions
      ssh_with_yubikey () { AGENT_SOCKET=$(ssh $@ gpgconf --list-dirs agent-socket) && ssh -A -R "$AGENT_SOCKET:$(gpgconf --list-dirs agent-socket)" -o "StreamLocalBindUnlink=yes" $@; }

      case "$(sed -n 's|^NAME=||p' /etc/os-release)" in
        "NixOS")
          DISTRO_SYMBOL=""
          ;;
        "Ubuntu"|'"Ubuntu"')
          DISTRO_SYMBOL=""
          ;;
        "Alpine Linux")
          DISTRO_SYMBOL=""
          ;;
        "Arch Linux")
          DISTRO_SYMBOL=""
          ;;
        "CentOS Linux")
          DISTRO_SYMBOL=""
          ;;
        "Fedora")
          DISTRO_SYMBOL=""
          ;;
        *)
          DISTRO_SYMBOL=""
          ;;
      esac

      export SYSTEM_GIT_REV="$DISTRO_SYMBOL ${rev}"
    '';
  };
}