
mate-control-center depends on mate-settings-daemon, but the later needs gsettings schemas provided by the former. To fix this the gsettings schema path from mate-control-center is added to XDG_DATA_DIRS at session startup.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.