This one has a disappointing papercut, because the package-plan is our
central authority.  'dht update p/haskell-hledger-ui' didn't import
the patch and series file associated with the version being imported.

Given that the package-plan tests consistency and passes, but then the
build of the package fails, this means the plan isn't being implemented properly.

Cheers,
Nicholas

Strictly speaking, it's also the case that 1120778 doesn't necessarily
block this bug, because the MSDOS carriage returns could be stripped if
`dht update` imported and converted a patch from the package-plan rather
than copying it over unmodified.  That seems like a risky solution to
me.