The possibility to make own themes?

[thepenguinthatwants]

According to the documentations. (https://framagit.org/fiat-tux/hat-softwares/lufi/wikis/create-a-new-theme)

I SH:d inside the container by
docker exec -ti lufi_lufi_1 sh

by this command it should create a skeleton for customizing theme
carton exec ./script/lufi theme name_of_your_new_theme

but it outputs:
Can't locate cpanfile: (cpanfile)