bug#58120: volctl missing gdk dependency?

[Josselin Poiret via Bug reports for GNU Guix <bug-guix@gnu.org>]

Hi, 

Simen Endsjø <simendsjo@gmail.com> writes:

> $ volctl 
> Traceback (most recent call last):
>   File "/gnu/store/phlappy7plp4gn2wm27f5bsp7wh9w9jd-volctl-0.8.2/bin/.volctl-real", line 33, in <module>
>     sys.exit(load_entry_point('volctl==0.8.2', 'gui_scripts', 'volctl')())
>   File "/gnu/store/phlappy7plp4gn2wm27f5bsp7wh9w9jd-volctl-0.8.2/bin/.volctl-real", line 25, in importlib_load_entry_point
>     return next(matches).load()
>   File "/gnu/store/zca340qfk43qys608q8pfwqqckll49qg-python-3.9.9/lib/python3.9/importlib/metadata.py", line 77, in load
>     module = import_module(match.group('module'))
>   File "/gnu/store/zca340qfk43qys608q8pfwqqckll49qg-python-3.9.9/lib/python3.9/importlib/__init__.py", line 127, in import_module
>     return _bootstrap._gcd_import(name[level:], package, level)
>   File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
>   File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
>   File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
>   File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
>   File "<frozen importlib._bootstrap_external>", line 850, in exec_module
>   File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
>   File "/gnu/store/phlappy7plp4gn2wm27f5bsp7wh9w9jd-volctl-0.8.2/lib/python3.9/site-packages/volctl/__main__.py", line 9, in <module>
>     gi.require_version("Gdk", "3.0")
>   File "/gnu/store/ycbgix6sxahsr34553af7pkvj27rywqc-python-pygobject-3.40.1/lib/python3.9/site-packages/gi/__init__.py", line 126, in require_version
>     raise ValueError('Namespace %s not available' % namespace)
> ValueError: Namespace Gdk not available

Can you try installing gobject-introspection in the same profile as
volctl?  Or if you're running through a guix shell, add it to the
invocation?

Best,
-- 
Josselin Poiret