Guake doesn't start because of a GConf issue

This article was originally published at https://gist.github.com/joepie91/ce9267788fdcb37f5941be5a04fcdd0f. It may or may not still be relevant.

From nixpkgs: GNOME's GConf implements a system-wide registry (like on Windows) that applications can use to store and retrieve internal configuration data. That concept is inherently impure, and it's very hard to support on NixOS.

1. Follow the instructions here.
2. Run the following to set up the GConf schema for Guake: gconftool-2 --install-schema-file $(readlink $(which guake) | grep -Eo '\/nix\/store\/[^\/]+\/')"share/gconf/schemas/guake.schemas". This will not work if you have changed your Nix store path - in that case, modify the command accordingly.

You may need to re-login to make the changes apply.