trying to install microlily

[Stefan Thomas]

Dear community,

I've recently tried to install microlily with the command

 lyp install microlily

Unfortunately I've got the message:

Cloning https://github.com/lyp-packages/microlily.git...
Installing microlily@0.1.0
Could not find include file reference join-path specified in /home/stefan/.lyp/packages/microlily@0.1.0/package.ly:3:

  "athenian"    = \pincludeOnce #(lyp:join-path microlily-dir "athenian.ly")

Can someone give me a hint, what I could do?

Thanks,

Stefan