Hi Marius,

> > +    (source
> > +      (origin
> > +        (method git-fetch)
> > +        (uri
> > +          (git-reference
> > +            (url "https://github.com/x42/avldrums.lv2.git")
> > +            (commit (string-append "v" version))
> > +            (recursive? #t)))   ; for the 'robtk' submodule
> 
> Can we package robtk separately?

The author expects it to be included in the plugin's sources, much like
DPF (DISTRHO plugin framework) based plugins. I don't know if it is
possible to package it, or at least if any of the plugins using it can
build with a packaged version without modifications. The Redkite
toolkit is a bit better because it outputs a .a library that you can
statically link with instead of having to include its sources, so that
was easy to package.

By the way, Arch does the same thing for this package. I believe Debian
too, but not 100% sure about Debian.

> Make sure to run 'guix lint' before resending these patches, to catch
> infraction issues :-)
Done, thank you!