Nixpkgs switched pkgs.formats.yaml to remarshal v2. Generated files now
start with a %YAML 1.1 directive and a --- document start, and multiline
strings use double-quoted escapes.
Only files written through yamlFormat.generate change. Modules that
declare the YAML type but write the file with builtins.toJSON keep their
current output.
Add any number of wine packages
Add any number of proton packages
Link runners directly from nix instead of using lutris.
Specify the steam package lutris should use.
Extra packages passed to lutris (mainly since it's often missing essential things, such as umu-launcher)
