Hi,

Hartmut Goebel <h.goebel@crazy-compilers.com> skribis:

>>> +       (modify-phases (@ (guix build qt-build-system) %standard-phases)
>>                           ^
>> As a rule of thumb, we should avoid using ‘@’ and ‘@@’.  So here, I’d
>> suggest writing
>>
>>   #:modules ((guix build qt-build-system) …)
>>
>> to make sure that module is in scope.
>
> AFAIU the module already is in scope, since it is part of
> %qt-build-system-modules. What I intend here is to address
> "%standard-phases" as defined in (guix build qt-build-system).

Actually, unless I’m mistaken, (guix build qt-build-system) is not in
scope by default.  To fix it, we need: