Please see the Android source page for building instructions.
To initialize your local repository using my trees, use the following command:
repo init -u https://github.com/SuperNexus/android_manifest.git -b kitkat
Then to sync up:
repo sync -j16
After the sync is finished, please read the instructions from the Android site on how to build.
Once you've read that, you can build with
make otapackage
Huge shout out to CyanogenMod Team and OmniROM Team, without them this ROM was not possible.