Comment 21 for bug 52486

 -> Considering g-wrap (>= 1.9.6-3.1)
      Tried versions: 1.9.6-3
   -> Does not satisfy version, not trying
E: Could not satisfy build-dependency.
E: pbuilder-satisfydepends failed.
Copying back the cached apt archive contents
 -> unmounting dev/pts filesystem
 -> unmounting proc filesystem
 -> unmounting /var/cache/prevu/debs filesystem
 -> cleaning the build env
    -> removing directory /var/cache/prevu/builds/27514 and its subdirectories
Traceback (most recent call last):
  File "/usr/bin/prevu", line 78, in ?
    do_build()
  File "/usr/bin/prevu", line 50, in do_build
    raise ValueError("Build failed.")

Doesn't build now, I'll look more into it, this is a worthwhile backport.