bug: conditional comments don't work

[ghost]

I try to compile following:
/ [if lt IE9] %script{src: "http://html5shiv.googlecode.com/svn/trunk/html5.js"}

but I have a syntaxError.
If I really have a syntax problem, please, give me an advice to solve this.

Here error message is:

SyntaxError: Unexpected identifier
at Function. (D:\Projects\omnigena\node_modules\gulp-haml\node_modules\haml\lib\haml.js:595:29)
at execute (D:\Projects\omnigena\node_modules\gulp-haml\node_modules\haml\lib\haml.js:602:8)
at Function.render (D:\Projects\omnigena\node_modules\gulp-haml\node_modules\haml\lib\haml.js:587:12)
at hamlStream (D:\Projects\omnigena\node_modules\gulp-haml\index.js:15:21)
at wrappedMapper (D:\Projects\omnigena\node_modules\gulp-haml\node_modules\map-stream\index.js:84:19)
at Stream.stream.write (D:\Projects\omnigena\node_modules\gulp-haml\node_modules\map-stream\index.js:96:21)
at Stream.ondata (stream.js:51:26)
at Stream.EventEmitter.emit (events.js:95:17)
at queueData (D:\Projects\omnigena\node_modules\gulp\node_modules\vinyl-fs\node_modules\map-stream\index.js:43:21)
at queueData (D:\Projects\omnigena\node_modules\gulp\node_modules\vinyl-fs\node_modules\map-stream\index.js:56:14)

Thanks.

[PragmaticEd]

Seriously? No solution after so many years?
This also happen if you add multi-dashed attributes, like:
meta{'data-test': 123}