The only way to stop a Build is to manually press the Tools -> Cancel Build menu item. The “CTRL + BREAK” combo doesn’t work.

Also, I tried recording my keystrokes and OS definitely catches “CTRL + BREAK” combo.

I couldn’t figure that out but I ended up doing this:

go to

Preferences -> Key Bindings - User

and paste the line below

{"keys": "ctrl+shift+b"], "command": "exec", "args": {"kill": true} } 

Now, you can use ctrl+shift+b instead of CTRL+BREAK

This is from http://stackoverflow.com/a/8552149/107161

If you want to know how to make ctrl+break shortcut work, see my answer : http://stackoverflow.com/a/30033772/4861714.

I have the same issue on Windows 7 with current Sublime Text 3.

I had to switch to:

{ "keys": "pause"], "command": "exec", "args": {"kill": true} },

]

I did exactly the same a while before btw.