anchor.diff:      find $out -name "*.py" | ${pythonForBuild} -O  -m compileall -q -f -x "lib2to3" -i -
       find $out -name "*.py" | ${pythonForBuild} -OO -m compileall -q -f -x "lib2to3" -i -
     '';
  +
  +  # Enforce that we don't have references to the OpenSSL -dev package, which we
  +  # explicitly specify in our configure flags above.
  +  disallowedReferences = [ openssl.dev ];
   
     passthru = let
       pythonPackages = callPackage ../../../../../top-level/python-packages.nix {
  
positive.code: , self
  , CF, configd
  , python-setup-hook
  # For the Python package set
  , packageOverrides ? (self: super: {})
  , buildPackages
  
negative.code:   sitePackages = "lib/${libPrefix}/site-packages";
  
    buildInputs = filter (p: p != null) [
      zlib bzip2 expat lzma libffi gdbm sqlite readline ncurses openssl nukeReferences ]
      ++ optionals x11Support [ tcl tk libX11 xproto ]
      ++ optionals stdenv.isDarwin [ CF configd ];
  
  