Hi, Jacob Hrbek schreef op vr 14-01-2022 om 05:58 [+0000]: > [...] > [source ] [function ] [line ] Locales on your system are not properly > configured. Falling back to defaults > terminate called after throwing an instance of 'std::runtime_error' >   what():  locale::facet::_S_create_c_locale name not valid >   (locale "en_US.utf8") IIRC and IIUC this is not a valid locale, try "en_US.UTF-8" instead. Maybe the Guix System code should check if the locale string looks reasonable ... Also, there appears to be a bug in a (dependency of) flameshot, because of [source ], [function ] and [line ] not being replaced with the location of the source file, function name and the line number, but that seems more something for upstream. Greetings, Maxime