Advice about guile-spec package definition

[Jérémy Korwin-Zmijowski]

Dear Guixters,

Hope you are doing well !

I am working on the package definition for 
https://framagit.org/Jeko/guile-spec (file: guix.scm). It is a set of
macro based on SRFI-64.

The definition's inputs field is filled with guile-3.0 (or the guix
build reports an error with a stack trace I can't understand haha).

For Guix users willing to try guile-spec before installing it, I know
guix environment can help.

But…

When I use guild (with highest warning level) to compile t.scm[1] in an
environment based on this definition, it raises unknown warnings :

$ guix environment -l guix.scm -- guild compile -W3 /tmp/t.scm
warning: unknown warning type `#{3}#'
wrote `/home/jeko/.cache/guile/ccache/3.0-LE-8-4.2/tmp/t.scm.go'

When I call it outside of the environment, the warning is fine :

$ guild compile -W3 /tmp/t.scm
/tmp/t.scm:3:0: warning: unused variable `name'
wrote `/home/jeko/.cache/guile/ccache/3.0-LE-8-4.4/tmp/t.scm.go'

When I remove Guile from the definition's inputs fiels, the warning is
fine :

$ guix environment -l guix.scm -- guild compile -W3 /tmp/t.scm
/tmp/t.scm:3:0: warning: unused variable `name'
wrote `/home/jeko/.cache/guile/ccache/3.0-LE-8-4.4/tmp/t.scm.go'


[1] t.scm doesn't use guile-spec macro to narrow the context
$ cat /tmp/t.scm 
(use-modules (srfi srfi-64))
(test-begin "group")
(test-assert "test" #t)
(test-end)


How can I make it to work ? Maybe I misuse something here… Let me know
!

Cheers,

Jérémy