[Emacspeak] What is preventing NixOS from packaging Emacspeak-60?

[Esben Stien <b0ef@xxxxxxxxxxxxxxxx>]

I know;). They are getting this message: 

Symbol’s function definition is void: cl-member

..in this bug:

https://github.com/NixOS/nixpkgs/pull/315408

Personally, I didn't get that error, but another error that I posted
here a few months ago, but if this gets fixed, that would also solve
getting it into NixOS;)

Any clues what this error can be?

-- 
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