A collection of machine configurations, expressed in Nix. Adapted from cmacrae/config & rycee/home-manager

$ NIX_PATH=$NIX_PATH:nixos-config=/home/tgunnoe/src/config/machines/<target system>/configuration.nix \
    sudo nixos-rebuild switch \
      -I nixos-config=/home/tgunnoe/src/config/machines/<target system>/configuration.nix

Note: <target system> here should point to the relevant directory for the system to build

nix.nixPath should also be updated to reflect the path.

After this, nixos-rebuild will just point at this configuration naturally.