Build specific package using catkin_make

Hi there,
I'm running **ROS Indigo** on **Raspberry Pi 2 model B**. I need to build some packages of my own. Whenever I do catkin_make, all the packages in the *src* is getting complied. I want to make only one package. I tried **catkin_make --pkg *package*** and **catkin_make -DCATKIN_WHITELIST_PACKAGES="package"**. Still every packages are getting build. Is there any other method to do this? Also why there are some extra folders in the workspace - build_isolated, devel_isolated and external_src. Why do we need them?

Thanks in advance.