Bug#865711: haskell-yaml: FTBFS everywhere (except all)

[Gianfranco Costamagna]

Hello,

>I don't know what we should do here.  The behavior of the embedded
>libyaml differs from our libyaml and I'm not sure why, but it appears

>to be on purpose.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=865675
because the embedded yaml is more up-to-date wrt the Debian one, and for
this reason I opened a bug report.

Patching yaml in Ubuntu made the whole stuff migrate, however seems that
some unintended side-effects are possible, according to pyyaml regressions
on i386.

https://github.com/snoyberg/yaml/issues/110

G.