1566de20c7
For some reason, the GNOME 3.26 update broke the overrides. It turns out the overrides now need to come before the overridden schemas in the XDG_DATA_DIRS variable. This is not possible in general due to applications prefixing the variable (e.g. in wrapGAppsHook). To fix this, a new environment variable NIX_GSETTINGS_OVERRIDES_DIR was introduced. It has greater priority than XDG_DATA_DIRS but lower than GSETTINGS_SCHEMA_DIR. A separate variable was chosen in order not to block the built-in one for users.
*** 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.