build properties not set properly

Hi All,
I have created a jazz build definition with properties set as follows.
property1=value
buildLabelPrefix=${property1}

When i execute a build, eventhough internally the value of property1 is subsituted for builLabelPrefix, in the build result window the value of buiuildLabelPrefix is shown as "${property1}-date&timeofbuild."

Could any one suggest a reason for this behaviour?.

In Short can we assign the value of a build property to the buildLabelPrefix property?

Thanks
Sanfi