Can't debugging Type Script in chrome with node js

I have three files in ./

• main.ts

• main.js

• main.js.map

I am doing node inspect-brk ./main.js,
opening chrome, typing chrome://inspect

Debugger is in the pause state. I press F10 to make a step. The problem is that chrome dev tools can't see ts file. All settings in chrome that allows to see source maps are settled. Chrome writes that Source Map detected and instructs me to add associated files in tree. I have tried to add main.ts in workspace but chrome don't want to jump into it.

What do I have to do to walk through ts code?

Node.js version is v8.0.0 
Chrome 59.0.3071.86
Type Script 2.3

via Oleg