error:
       … while calling the 'derivationStrict' builtin
         at «nix-internal»/derivation-internal.nix:37:12:
           36|
           37|   strict = derivationStrict drvAttrs;
             |            ^
           38|

       … while evaluating derivation 'nix-shell'
         whose name attribute is located at «https://releases.nixos.org/nixpkgs/nixpkgs-26.11pre1056542.f4b6996c4e8b/nixexprs.tar.xz?narHash=sha256-tkD1h/1jLJ6qZHjG7/TOZT1qqI1ej3VPPCufHQyv1Uo%3D»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'GENERATED_DOCS' of derivation 'nix-shell'

       … while evaluating definitions from `/nix/store/08z84w85zlhmb738236n584ysbdagcx4-source/modules/clan/module.nix':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: Flake does not have 'input' named 'nixpkgs'