Experimental gives buildd-unstable lower priority than unstable?

[Adrian Bunk <bunk@debian.org>]

Hi,

when using a dw in experimental to wait for a non-buggy version of a 
package in unstable (like with libreoffice and curl due to #1077197),
the package starts building in experimental at the right time - but
still uses the old package. Extra-Depends works.

Is there something in the priorities in experimental buildd chroots that 
results in packages in buildd-unstable being treated lower priority than 
packages in unstable?

cu
Adrian