[Nix-dev] bootstrap failure

[Michael Raskin]

>Anyone know what might be going wrong with the nix-env invocation in the  
>bootstrap attempt below?  This was following a "bash  
>/mnt/nix/store/nixos-prepare-install checkout-sources" operation.
>
>+ /nix/store/v8yf6bzqzgfszd3v6q15f100hq6x73yl-nix-1.0pre26015/bin/nix-env  
>-p /nix/var/nix/profiles/system -f /etc/nixos/nixos --set -A system -j2  
>--keep-going
>error: user-thrown exception: Not defined.
>(use `--show-trace' to show detailed location information)

Looks like you need to set some variables in configuration.nix. 

Without --show-trace output, it is hard to give any details..