{ pkgs }:
pkgs.writeScriptBin "myvnc" ''
    #!${pkgs.runtimeShell}

    uid=`id -u`
    port=$((9000+$uid))
    shell=`getent passwd $(id -un) | awk -F : '{print $NF}'`
    # vnc=${pkgs.tigervnc}/bin/vncserver
    vnc=/nix/store/czp2b60dwk75widi8y287hr0xx1wgv2a-tigervnc-1.10.1/bin/vncserver

    case $1 in
    -p|--port) shift; port=$1 ;;
    kill|stop)
        display=$($vnc -list | sed  -n 's/^\(:[0-9]\+\).*/\1/p'| head -1)
        $vnc -kill $display
        exit 0
        ;;
    esac
    ps ax | sed '/grep/d' | grep "Xvnc.*-rfbport $port" >/dev/null 2>&1
    [ $? = 1 ] && $vnc -rfbport $port
    echo "Xvnc server is running on port $port."
    exec $shell -i
  ''