Hi, Currently gnome-tweak-tool and gnome-control-center doesn't have gnome-shell as input (in gnome.scm package definition). This results in issues when some new package with gsettings schemas is installed. without access to gnome-shell schemas, gnome-tweak-tool won't ever work, so it is mandatory. And for the case of gnome-control-center, the keyboard panel segfaults if gnome-shell schema isn't present. But since gnome-shell may not be used by all g-c-c user, it may not be good to have a hard dependency on gnome-shell, but if installed, the schemas of gnome-shell should too be added as input (is it possible to do so?) How to reproduce (hopefully gnome-shell is being used): 0. Install gnome-control-center and gnome-tweak-tool. 1. install some gnome application (eg: guix package -i gnome-calculator) It doesn't matter if you have already installed the package 2. run gnome-tweak-tool or run gnome-control-center and click Keyboard result: 0. gnome-tweak-tool: WARNING : Shell not installed or running WARNING : Shell not running None WARNING : Error detecting shell Traceback (most recent call last): File "/gnu/store/8cjmr5x8dxqkfcvlk20p3zc4si7q33jr-gnome-tweak-tool-3.24.1/lib/python2.7/site-packages/gtweak/tweaks/tweak_group_shell_extensions.py", line 279, in __init__ raise Exception("Shell not running or DBus service not available") Exception: Shell not running or DBus service not available Traceback (most recent call last): File "/gnu/store/8cjmr5x8dxqkfcvlk20p3zc4si7q33jr-gnome-tweak-tool-3.24.1/lib/python2.7/site-packages/gtweak/app.py", line 41, in do_activate self.win = Window(self, model) File "/gnu/store/8cjmr5x8dxqkfcvlk20p3zc4si7q33jr-gnome-tweak-tool-3.24.1/lib/python2.7/site-packages/gtweak/tweakview.py", line 58, in __init__ self._model.load_tweaks(self) File "/gnu/store/8cjmr5x8dxqkfcvlk20p3zc4si7q33jr-gnome-tweak-tool-3.24.1/lib/python2.7/site-packages/gtweak/tweakmodel.py", line 129, in load_tweaks mods = __import__("gtweak.tweaks", globals(), locals(), tweak_files, 0) File "/gnu/store/8cjmr5x8dxqkfcvlk20p3zc4si7q33jr-gnome-tweak-tool-3.24.1/lib/python2.7/site-packages/gtweak/tweaks/tweak_group_shell.py", line 98, in sw = StaticWorkspaceTweak(size_group=sg, loaded=_shell_loaded) File "/gnu/store/8cjmr5x8dxqkfcvlk20p3zc4si7q33jr-gnome-tweak-tool-3.24.1/lib/python2.7/site-packages/gtweak/tweaks/tweak_group_shell.py", line 50, in __init__ default = self.STATUS.keys()[self.STATUS.values().index(self.settings[self.key_name])] ValueError: None is not in list ^C 1. gnome-control-center (gnome-control-center:25833): GLib-GIO-ERROR **: Settings schema 'org.gnome.shell.keybindings' is not installed Trace/breakpoint trap Thanks