Writing DVDs
There seems to be various issues (permissions) with DVD burning programs not working out of the box. This is what I do:
nix-shell -p k3b dvdplusrwtools
You may need to set a newer packages version with -I nixpkgs=
and then
env QT_PLUGIN_PATH=/nix/store/d7q3q6wmfccss8gcp09r33xg0wkbz9gb-qtbase-5.11.0-bin/lib/qt-5.11/plugins/ k3b
where QT_PLUGIN_PATH
is an appropriate store path. See also Qt#qt.qpa.plugin:_Could_not_find_the_Qt_platform_plugin_.22xcb.22_in_.22.22