Chromecast modules not included [4.0.0a10]

I was attempting to implement VLCRendererDiscoverer but noticed when setting the chromecast render item that modules for chromecast were unavailable?

Here are some logs to show this

[DBG] creating stream output chain `chromecast{ip=...local.,port=8009}'
[DBG] stream=`chromecast'
[DBG] looking for sout output module matching "chromecast": 0 candidates
[DBG] no sout output modules matched with name chromecast
[DBG] destroying chain... (name=(null))
[DBG] destroying chain done
[ERR] failed to create stream output chain `chromecast{ip=...local.,port=8009}'
[ERR] cannot start stream output instance, aborting
[ERR] Failed to start sout

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