This procedure 'maybe-inputs', or at least a similar procedure, already
seems to exist in (guix import utils).

Thanks for this hint.

Unfortunately that return „old-style“ inputs:

  (inputs
   `(("erlang-base64url" ,erlang-base64url)

-- 
Regards
Hartmut Goebel

| Hartmut Goebel          | h.goebel@crazy-compilers.com               |
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