{ lib
, python3
}:

let python = python3.override {
  self = python;
  packageOverrides = self: super: {
    # see https://github.com/devicetree-org/dt-schema/issues/108
    jsonschema = super.jsonschema.overridePythonAttrs (old: rec {
      version = "4.17.3";
      disabled = self.pythonOlder "3.7";

      src = old.src.override {
        inherit version;
        hash = "sha256-D4ZEN6uLYHa6ZwdFPvj5imoNUSqA6T+KvbZ29zfstg0=";
      };

      propagatedBuildInputs = with self; ([
        attrs
        pyrsistent
      ] ++ lib.optionals (pythonOlder "3.8") [
        importlib-metadata
        typing-extensions
      ] ++ lib.optionals (pythonOlder "3.9") [
        importlib-resources
        pkgutil-resolve-name
      ]);
    });
  };
}; in python.pkgs.toPythonApplication python.pkgs.dtschema