To get started with the building process, you'll need to get familiar with Git and Repo.

To initialize your local repository, use a command like this:

repo init -u git://github.com/AIMROM/manifest.git -b o

Then to sync up:

repo sync  -f --force-sync --no-clone-bundle --no-tags -j$(nproc --all)

Additionally, you can define the number of parallel download repo should do:

repo sync -jX -f --force-sync --no-clone-bundle --no-tags

With X being the number of parallel downloads

From root directory of AIM type following commands in terminal

. build/envsetup.sh

lunch aim_$devicecodename-$BuildType

brunch $devicecodename

If your device code name is "goldfish", then:

. build/envsetup.sh

lunch aim_goldfish-userdebug

brunch goldfish

From the root directory of AIM type following commands in the terminal

cd $OUT/target/product/$devicecodename/$AIM*.zip