Adding custom include-path folders to LESS.build

I am currently using Sublime Text with LESS.build package to compile my .less files into CSS.

My current LESS.build cmd is:

"cmd": ["lessc", "screen.less", "${file_path}/screen.css", "--verbose"]

I tried to add some extra folders to the --include-path:

"cmd": [
    "lessc",
    "screen.less",
    "${file_path}/screen.css", 
    "--verbose", 
    "--include-path='.:/var/www/whatever/'"
]

But, whenever i try to build my .less files the --include-path params seems to be ignored.

The only workaround i found is adding the full relative path on my @import:

@import "../../../www/whatver/config.less"; //Ugly solution

Can anyone point me where i am failing and/or any other workaround prettier than mine's?