<p>Now either <a href="http://doc.riot-os.org/group__cpu__esp8266.html#esp8266_precompiled_toolchain" rel="nofollow">the documentation</a> or <a href="https://github.com/gschorcht/RIOT-Xtensa-ESP8266-toolchain.git">RIOT-Xtensa-ESP8266-toolchain</a> need an update too.</p>
<p>When following the instructions, esptool.py v2.5.1 gets installed which doesn't know about this new notation.</p>

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