My home-manager config is not currently readTree compatible, which means
that it's not built by CI. This constructs a house of cards around
home-manager to make this buildable in CI.
Change-Id: I80480f24ff47347f46d708edbbf34d59fa76adac
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2123
Tested-by: BuildkiteCI
Reviewed-by: multi <depot@in-addr.xyz>