How to Fix: configure: error: Package requirements (libnotify >= 0.6.1) were not met:

So you got this, huh:

configure: error: Package requirements (libnotify >= 0.6.1) were not met:

No package 'libnotify' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

To fix it, type the following in your Terminal:

sudo apt-get install libnotify-dev