How to use the Haxe Swift target?

So I just installed the haxe swift target from https://github.com/ralcr/swift-target and I can't figure it out all my life, m have to get it to compile a file .hx

to a file .swift

.

I've tried haxe -main HelloWorld.hx -swift [filename]

as well haxe -main HelloWorld.hx -swift [directory]

(and yes, I replaced both [filename] and [directory] with the appropriate replacements) but doesn't work. How do I compile it to a swift file?