NixOS installation failed with hash mismatch in "fix-bug-80431.patch"

Campus network of Mainland China. unable to download 'https://cache.nixos.org/nix-cache-info': SSL connect error (35) and error occured with hash mismatch in fixed-output derivation '/nixos/store/...-fix-bug-80431.patch.drv', followed by several dependencies of derivation ... failed to build, when installing NixOS 22.11 in VirtualBox, via both minimal and graphical (GNOME) installers.

This can be solved by specifying nix.settings.substituters with forced CERNET MirrorZ in configuraion.nix in case of minimal installer. But I am new to GNU/Linux and it’s unfamiliar and untransparent for me to set up the system with CLI. Is there any way to solve it for graphical installer?