O (output) parameter only indicates directory

[oleiba]

What OS AM I using?
Windows 10 64bit

What happened?
When using both Node.js and CLI API - the O parameter in the options field - creates a directory of that value instead of a file.
For example if I inserted {O: 'setup.exe'} I eventually found a directory called setup.exe and inside it the installer carrying the name of the executable inside the folder I gave in the first parameter.

What was expected to happen?
The O parameter should have created a file called setup.exe rather than a directory.