It's a reproducible thing, until the pile of crap in the abstraction layer they built with Nix on top of Linux fails for any number of reasons, whether they red

It's a reproducible thing, until the pile of crap in the abstraction layer they built with Nix on top of Linux fails for any number of reasons, whether they redefined a variable, removed it, direct flaws in the NixOS or Linux mechanisms below or something else.