Resolving poetry dependency conflict in a dev shell

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I am currently trying to set up a dev shell as a flake for python development. However when running nix develop I run into the following error during the pyhtonRuntimeDepsCheck

       > Checking runtime dependencies for poetry-2.2.1-py3-none-any.whl
       >   - pbs-installer<2026.0.0,>=2025.1.6 not satisfied by version 2026.1.13

This is the flake that I am currently using (missig the profile as the error is the same but you don’t need to read as much code here)


  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pythonPkgs = pkgs.python311Packages;
        python = pkgs.python311;
        system = "x86_64-linux";
        pkgs = import nixpkgs { inherit system; };
        fhs = pkgs.buildFHSEnv {
          name = "mainline_shell";
          targetPkgs = pkgs: (with pkgs; [
            poetry
            python
            pythonPkgs.pip
            ta-lib
            stdenv.cc.cc.lib
            #binutils
            libz
            graphviz
            glibc
            gnumake clang boost pkg-config cmake
          ]);

          runScript = "bash";
        };
      in
      {
        devShells.default = fhs.env;
      }
    );
}

Now it seems like I should use an older version of the pbs-installer. Looking at the file in the nixpkgs repo nixpkgs/pkgs/by-name/po/poetry/unwrapped.nix at b14f9cf0d8fcf4fbd4e9ffea86df80ca56aaa16a · NixOS/nixpkgs · GitHub it seems like a possibility would be to override the dependency of the pbs-installer. However I was unsuccessful in doing so. Would be great if someone had an idea of how to make this work.

Update: this also seems to be a general issue in nixpkgs at the moment as

nix shell nixpkgs#poetry

also fails