git clone https://github.com/lede-project/source
cd source
echo "src-git cups https://github.com/Gr4ffy/lede-cups.git" >> feeds.conf.default
./scripts/feeds update -a
./scripts/feeds install -a
make menuconfig (set Network->Printing->cups as "M")
make
copy /source/bin/packages//cups/*.ipk to machine & opkg install