RPI2 + Jessy instalation error

Dear Experts,
I’m not an expert but I like the idea of RPI and blynk together this is why I tried to install blynk libraries on my RPI with clean and fresh Jessy image following instructions provided in doc section but I got following error when executing step:
sudo npm install -g onoff

Any advice?

It’s not Blynk error.
Looks like the issue is with onoff library installer.