How to over-write the property in Ant?

Question

Is there a way to re-assign the value for the Ant property task? Or is there another task available for that purpose?

Answer 1

For the sake of justice, there is a hack that allows to alter ant's immutable properties without any additional libs (since java 6):

    
    
        project.setProperty(attributes.get("name"), attributes.get("value"));

Usage:

    
    
    ${x}   

As others mentioned, this should be used with care after all canonical approaches proved not to fit.