anchor.diff:      };
     };
   
  +  unicorn = buildPythonPackage rec {
  +    name  = "unicorn-${version}";
  +    version = "1.0.1";
  +    src = pkgs.fetchurl {
  +      url = "mirror://pypi/u/unicorn/${name}.tar.gz";
  +      sha256 = "0a5b4vh734b3wfkgapzzf8x18rimpmzvwwkly56da84n27wfw9bg";
  +    };
  +    setupPyBuildFlags = [ "--plat-name" "linux" ];
  +    meta = with pkgs.stdenv.lib; {
  +      description = "Unicorn CPU emulator engine";
  +      homepage = "http://www.unicorn-engine.org/";
  +      license = [ licenses.gpl2 ];
  +      maintainers = with stdenv.maintainers; [ bennofs ];
  +    };
  +  };
  +
  +  intervaltree = buildPythonPackage rec {
  +    name = "intervaltree-${version}";
  +    version = "2.1.0";
  +    src = pkgs.fetchurl {
  +      url = "mirror://pypi/i/intervaltree/${name}.tar.gz";
  +      sha256 = "02w191m9zxkcjqr1kv2slxvhymwhj3jnsyy3a28b837pi15q19dc";
  +    };
  +    buildInputs = with self; [ pytest ];
  +    propagatedBuildInputs = with self; [ sortedcontainers ];
  +    checkPhase = ''
  +      runHook preCheck
  +      # pytest will try to run tests for nix_run_setup.py / files in build/lib which fails
  +      mv nix_run_setup.py run_setup
  +      rm build -rf
  +      ${python.interpreter} run_setup test
  +      runHook postCheck
  +    '';
  +    meta = with pkgs.stdenv.lib; {
  +      description = "Editable interval tree data structure for Python 2 and 3";
  +      homepage =  https://github.com/chaimleib/intervaltree;
  +      license = [ licenses.asl2 ];
  +      maintainers = with stdenv.maintainers; [ bennofs ];
  +    };
  +  };
  +
     packaging = buildPythonPackage rec {
       name = "packaging-16.8";
       src = pkgs.fetchurl {
  
positive.code:     };
      propagatedBuildInputs = with self; [ pyparsing six ];
      buildInputs = with self; [ pytest pretend ];
      meta = with pkgs.stdenv.lib; {
        description = "Core utilities for Python packages";
        homepage = "https://github.com/pypa/packaging";
        license = [ licenses.bsd2 licenses.asl20 ];
        maintainers = with maintainers; [ bennofs ];
      };
  
      checkPhase = ''
        py.test
      '';
    };
  
    pypandoc = buildPythonPackage rec {
  
negative.code:       license = licenses.mit;
        maintainers = with maintainers; [ bennofs ];
      };
    };
  
    ROPGadget = buildPythonPackage rec {
  