In my node.js project I use log4js and I want my logs to have name of the file where log record was added. So I use __filename but it gives me absolute path

var logger = log4js.getLogger(__filename)

So it gives me logs like this:

[1999-01-01 00:00:00] [DEBUG] /Users/whatever/myproject/src/services/users something happened

But I want the path to be relative to my project/src folder. Like this:

[1999-01-01 00:00:00] [DEBUG] services/users something happened

What is the best way to achieve this?