Compiling epan-sys fails

I am trying to build a wireshark dissector using the rust crate wsdf.
While complinig epan-sys in my dev environment I get the following error:

CMake Error: The source directory "/home/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/epan-sys-0.1.0/wireshark" does not exist.

my flake:

{
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
  inputs.nci.url = "github:yusdacra/nix-cargo-integration";
  inputs.nci.inputs.nixpkgs.follows = "nixpkgs";
  inputs.parts.url = "github:hercules-ci/flake-parts";
  inputs.parts.inputs.nixpkgs-lib.follows = "nixpkgs";
  inputs.treefmt-nix.url = "github:numtide/treefmt-nix";

  outputs = inputs@{ parts, nci, treefmt-nix, ... }:
    parts.lib.mkFlake { inherit inputs; } {
      systems = [ "x86_64-linux" ];
      imports = [ nci.flakeModule treefmt-nix.flakeModule ];
      perSystem = { pkgs, config, ... }:
        let crateName = "dissector";
        in let
          base_shell = config.nci.outputs.${crateName}.devShell.overrideAttrs
            (old: {
              packages = (old.packages or [ ]) ++ [
                pkgs.lldb
                pkgs.rust-analyzer
                pkgs.cargo-nextest
                pkgs.pkg-config
                pkgs.cargo-vet
                pkgs.cargo-audit
                pkgs.samply
                pkgs.cmake
                pkgs.wireshark.dev
              ];
              shellHook = ''
                ${old.shellHook or ""}
                echo "Wellcome in ${crateName}!"
              '';
            });

        in {
          # declare projects
          nci.projects.${crateName}.path = ./.;

          devShells.default = base_shell;

          # configure crates
          nci.crates.${crateName} = {
            ### override stdenv for both dependencies and main derivation ###
            #depsDrvConfig = { deps.stdenv = pkgs.clangStdenv; };
            #drvConfig = { deps.stdenv = pkgs.clangStdenv; };
            # note: for overriding stdenv for *all* packages in a project
            # you can use `drvConfig` and `depsDrvConfig` under `nci.projects.<name>`
            # instead.
          };
        };
    };
}

Any idea how to fix the issue is welcome