anchor.diff:  
     postPatch = ''
       substituteInPlace conans/requirements.txt \
  -      --replace "PyYAML>=3.11, <3.14.0" "PyYAML" \
  -      --replace "deprecation>=2.0, <2.1" "deprecation" \
  -      --replace "idna==2.6" "idna" \
  -      --replace "cryptography>=1.3.4, <2.4.0" "cryptography" \
  -      --replace "pyOpenSSL>=16.0.0, <19.0.0" "pyOpenSSL" \
  -      --replace "six>=1.10.0,<=1.14.0" "six"
  +      --replace "deprecation>=2.0, <2.1" "deprecation"
     '';
   
     meta = with lib; {
  
positive.code: { lib, stdenv, python3, fetchFromGitHub, git, pkg-config, fetchpatch }:
  
  # Note:
  # Conan has specific dependency demands; check
  
negative.code:         sha256 = "1dv6mjsm67l1razcgmq66riqmsb36wns17mnipqr610v0z0zf5j0";
        };
      });
      urllib3 = super.urllib3.overridePythonAttrs (oldAttrs: rec {
        version = "1.25.11";
        src = oldAttrs.src.override {
          inherit version;
          sha256 = "18hpzh1am1dqx81fypn57r2wk565fi4g14292qrc5jm1h9dalzld";
        };
      });
    };
  };
  
  in newPython.pkgs.buildPythonApplication rec {
    version = "1.35.0";
    pname = "conan";
  
    src = fetchFromGitHub {
      owner = "conan-io";
      repo = "conan";
      rev = version;
      sha256 = "19rgylkjxvv47vz5vgh46rw108xskpv7lmax8y2fnm2wd1j3bq9c";
    };
  
    propagatedBuildInputs = with newPython.pkgs; [
  