Attribute `nuenv` missing on `pkgs` in the example flake

[starptr]

When running nix build on the example flake on the readme, nix build complains that pkgs.nuenv doesn't exist.

error: attribute 'nuenv' missing

       at /nix/store/sz6ip46qxi6rl4q6x41diwrj9f7rx42d-source/flake.nix:16:17:

           15|     packages = forAllSystems ({ pkgs, system }: {
           16|       default = pkgs.nuenv.mkDerivation {
             |                 ^
           17|         name = "hello";
       Did you mean one of naev, nodenv, nuXmv, nusmv or rbenv?

[lucperkins]

Should be fixed. Thanks for reporting!