Packaging the game for Chakra, I noticed Red Eclipse uses Enet library, but it compiles it instead of using system’s. Since in our distribution we have the right version of Enet (1.3.3 currently), I though about trying to make the game use it instead of compiling a new one just for the game. And I succeed

You can find the patch here. You can apply it to src/Makefile. It was tested with Red Eclipse 1.1 and it worked. In fact, just to be sure I compiled it after deleting src/enet, src/include and src/lib (or similar names).
PS: thanks to HTN-Kitsune for helping me a bit through the IRC channel.