I feel like Unreal Engine for Linux is obsessed with compiling stuff:

Want to get Unreal Engine? Here's the source code, go compile it yourself.
Installed that, let's launch it. Compiles more stuff.
Now you're on the project selection screen, good job! Imma compile these shaders though.
Want to make a project with C++? That means I'll have to compile some more stuff...

If only my CPU wasn't a potato it wouldn't be so bad.