Accessing caches.nixos.org is extremely from my side for the moment.
I tried to use the
--option binary-cache option when I run
nixos-rebuild boot, but it complained that
warning: ignoring untrusted substituter 'https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store'
and ignored the binary cache that I supply.
Is there a way to force nixos-rebuild to trust my cache on-the-fly?
Though I can add it into configuration.nix, but it can only be applied after I succeed to run