opensaml-cpp: fix darwin builds

pkgs/development/libraries/opensaml-cpp/default.nix

···
 { lib, stdenv, fetchgit, autoreconfHook, pkg-config
-, boost, openssl, log4shib, xercesc, xml-security-c, xml-tooling-c, zlib
+, darwin, boost, openssl, log4shib, xercesc, xml-security-c, xml-tooling-c, zlib
 }:
 
 stdenv.mkDerivation rec {
···
 
   buildInputs = [
     boost openssl log4shib xercesc xml-security-c xml-tooling-c zlib
-  ];
+  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    CoreServices
+    SystemConfiguration
+  ]);
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
   configureFlags = [ "--with-xmltooling=${xml-tooling-c}" ];