I found that I could get it compiled fine with:
build-essential cmake cmake-gui git python-all-dev libglew-dev libsdl-dev libdevil-dev libopenal-dev libogg-dev libvorbis-dev libfreetype6-dev p7zip-full libxcursor-dev libboost-thread-dev libboost-regex-dev libboost-system-dev libboost-program-options-dev libboost-signals-dev
Download the source for 91.0 and unpack it into an empty directory.
Navigate into the directory you unpacked the source into in a terminal and run:
cmake .
Let that finish and then run:
make
When that is done, run:
sudo make install
That is how I did it on my Xubuntu 12.10 system, it may or may not work equally well on Arch (obviously replacing the Ubuntu commands with Arch commands, if any Ubuntu specific commands are used here). Theoretically it should work on Arch, but it may not. Post your terminal output if you run into trouble with it.