Hi. I’m new to NixOS, so please forgive me if this is my mistake. I have to say I’m loving the distro so far 
I’m trying to use the onlykey desktop app to update the firmware on my onlykey, but when I click the button to select the firmware file the app crashes. This also happens for any other button in the app that should open a file picker, such as selecting backup file location. If run from a terminal it gives the following output…
[5942:5942:1218/130228.900638:ERROR:sandbox_linux.cc(376)] InitializeSandbox() called with multiple threads in process gpu-process.
(nw:5916): GLib-GIO-ERROR **: 13:02:34.950: No GSettings schemas are installed on the system
/run/current-system/sw/bin/onlykey: line 2: 5916 Trace/breakpoint trap (core dumped) /nix/store/zshzf4rh5n7wg1k2z5vinhkp15m9hzmq-nwjs-0.54.1/bin/nw /nix/store/kwp1bh0z54hprfy8d0d16h41z1v2gy8i-OnlyKey-5.3.4/lib/node_modules/OnlyKey/build
I’m using KDE, but I have explicitly specified both gsettings-qt and gsettings-desktop-schemas in my configuration.nix. How can I make this work?
Thanks in advance for any answers.