treewide: cmake buildInputs to nativeBuildInputs, minor cleanups

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

@@ -12,14 +12,13 @@ stdenv.mkDerivation rec {
     fetchSubmodules = true;
   };
 
-  buildInputs = [ cmake boost openssl ];
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ boost openssl ];
 
   cmakeFlags = [
     "-DCPP-NETLIB_BUILD_SHARED_LIBS=ON"
   ];
 
-  enableParallelBuilding = true;
-
   # The test driver binary lacks an RPath to the library's libs
   preCheck = ''
     export LD_LIBRARY_PATH=$PWD/libs/network/src