Prepare environment

Generate key for signing build package: import existing key gpg2 --keyserver x-hkp://pool.sks-keyservers.net --recv-keys 9EBCB0B3 or generate new gpg --gen-key and export it gpg2 --keyserver hkp://pool.sks-keyservers.net --send-keys A6BAB25C

install if needed sudo aptitude install haveged