Details of broken `nix.channel.enable` option?

[Winter]

sanix/root.nix

Lines 31 to 33 in 37b7f37

 # This option is broken when set false, prevent people from setting it to false 
 # And we implement the important bit above ourselves 
 nix.channel.enable = true; 

How exactly is this option broken? The implementation (as of when you wrote that comment) looks sane to me -- could you give more details so that we can fix it? :)

[Silvan Mosberger]

See NixOS/nixpkgs#273170