'apt-get install uec^' looks up all packages with 'uec' in their Task
field, and installs them.  The Task fields are set by magic
automatically generated overrides in the archive, based on germinate
output.  Sadly, they are not generated properly for karmic-updates.

However, this isn't really the core problem in this case.  Putting
kernels in the uec seed at all is the core problem, and I must apologise
for not noticing this at the time.  The reason this is bad is that the
kernel ABI changes frequently, and once a release is final we never
change its Packages files again!  Thus "Task: uec" on linux-
image-2.6.31-302-ec2 in dists/karmic/main/binary-*/Packages is frozen
for the lifetime of karmic; while technically we *could* regenerate
those files, we have never done so for stable Ubuntu releases,
preferring to update only karmic-updates and the like, and I expect that
things would go wrong if we did - for example, consider what happens
when somebody tries to build an image using only karmic and not karmic-
updates, or consider that some mirrors may well assume that
dists/karmic/ will never change.

My recommendations are as follows:

  * For Karmic, perhaps it is possible to work around this in vm-builder.  For 
example, 'apt-get install uec^ linux-image-2.6.32-302-ec2- linux-image-ec2- 
linux-ec2-' installs the uec task without the ec2 kernel bits; some elaboration 
of this might be constructed to use the updated ABI.
  * For Lucid, remove all kernels from the uec seed, and instead install them 
manually (so 'apt-get install uec^ linux-ec2 linux-virtual' or whatever).  It 
is not safe to put kernels in seeds for which Task fields are generated.
  * We should institute some kind of archive-level test to ensure that kernels 
never have Task fields.

-- 
karmic uec builds fail to publish due to 2 installed -ec2 kernels
https://bugs.launchpad.net/bugs/524020
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