# Pastebin p1JgNX5u
[matt@nixos:~/nixpkgs]$ sudo nixos-rebuild switch --impure
building the system configuration...
error: --- UndefinedVarError ------------------------------------------------------------------------- nix
at: (93:55) in file: /nix/store/vrplpqnni822vk2yh8rkxzm7zcalzwfs-source/flake.nix

    92|           ]
    93|           ++ lib.optionals stdenv.isLinux [libseccomp utillinuxMinimal]
      |                                                       ^
    94|           ++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium

undefined variable 'utillinuxMinimal'
(use '--show-trace' to show detailed location information)