Does not compile on Ubuntu

[fir3-1ce]

I followed the 3 steps for compiling on Linux, and it's not working. When I run make, I get this:

make[1]: Entering directory '/home/anon/source-code/carnage3d/.build'
==== Building GLFW (release_x86_64) ====
==== Building carnage3d (release_x86_64) ====
stdafx.h
../src/stdafx.h:36:10: fatal error: 'memory' file not found
#include <memory>
         ^~~~~~~~
1 error generated.
make[2]: *** [carnage3d.make:234: obj/x86_64/Release/carnage3d/stdafx.h.gch] Error 1
make[1]: *** [Makefile:37: carnage3d] Error 2
make[1]: Leaving directory '/home/anon/source-code/carnage3d/.build'
make: *** [Makefile:24: build_release] Error