Ralf Barkow wrote:

> 
> Hoi all,
> 
> maven clean build just failed with
> geronimo-spec-j2eeschema-DEV.jar (no download url specified)
> error message.

This is because clean must not be called until Geronimo has already been 
built. Please follow instructions at 
http://wiki.apache.org/geronimo/BuildingAndRunning.

Cheers,
Jacek