Beta release DUB 1.0.0-beta.1

[Andre Pany via Digitalmars-d-announce]

On Thursday, 9 June 2016 at 12:15:24 UTC, Sönke Ludwig wrote:
> You need to use the --single switch:
>
> dub build --single=app.d --build=release
>
> For the commandline that you have used, the arguments "build 
> --build=release" will be passed to the compiled app.d 
> executable instead. I'll deploy proper documentation together 
> with the release.

It is still not working. I have an easy example:

------------ file app.d ---------------

/+ dub.sdl:
  name "app"
+/

void main()
{
	import std.stdio;
	writeln("ABC");
}
------------ file app.d ---------------

While executing command:
dub --single=app.d

there is the error:
Error processing arguments: Can't parse string: bool should be 
case-insensitive 'true' or 'false'

Is this a bug?

Kind regards
André