bug#57284: mail command from mailutils fails to send messages

[semente]

Hello, I couldn't make the mail command (from mailutils package) send messages 
in a GUIX system.

That is what I get when trying to send a local message:

  $ echo test | mail semente  
  mail: Cannot open mailer: No such file or directory
  mail: cannot send message: No such file or directory

I have opensmtpd running.

Thanks,
semente