When using extlinux-conf-builder in a nix build using chroots, the following error message could be seen: /nix/store/XXX-extlinux-conf-builder.sh: line 121: cd: /nix/var/nix/profiles: No such file or directory To avoid this, just skip the code path parsing /nix/var/nix/profiles when $numGenerations (passed from the command line) is 0 (which is the only legal value of $numGenerations in a nix build context).
*** 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.