
Passing the chroot flag to nixos-install without arguments should now give you a Bash shell as intended rather than try an empty path. This was masked by the user's shell (usually /bin/bash) being defaulted to by chroot, and being found since their paths used NixOS conventions.
*** 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.