sorry for the late reply.
Evok in version 1 is no longer supported (didn't you mean Evok-mini?). The current version of Evok is 2.1.x. As the first step, you should try to download and install the latest version via Debian package subsystem:
apt-get update apt-get install evok
wget https://repo.unipi.technology/debian/pool/e/evok_2.1.2_armhf.deb dpkg -i evok_2.1.2_armhf.deb