v0.1.1 flakehub adoption are there steps missing on my side ?

[573]

I'm trying to run only rust devShell via

nix develop http://rime.cx/v1/github.com/the-nix-way/dev-templates/tag/v0.1.1.tar.gz?dir=rust --impure
error:
       … while evaluating flake attribute 'nixpkgs'

         at /nix/store/sqm8pjxzif0aqqw24sqk6gyc68v0dg2d-source/rust/flake.nix:5:5:

            4|   inputs = {
            5|     inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
             |     ^
            6|     rust-overlay = {

       error: flake input attribute 'nixpkgs' is a thunk while a string, Boolean, or integer is expected

[573]

See #31