UE4 Size (2018)

I am new to the Unreal Engine and want to use it for Ubuntu 18.04. I’ve cloned the latest repository to build one. One thing that startled me after running [FONT=courier new] was the size of dependencies which even after limiting it to Linux was around 31Gib (~32GB). Are they really a lot for Linux or do I need to install some of them externally to save data? The sheer amount of data screws my internet connection.