7748c3da1b
The system variable is used from the (possibly polluted) shell environment. This causes nixos-install to fail in a nix-shell because the system shell variable is automatically set to the current system (e.g. x86_64-linux).
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.