Github user rmetzger commented on the issue:
https://github.com/apache/flink/pull/4553
Afaik the problem is that the doc builders are independent of Flink
version. So we use the same toolchain for building 0.8 docs and 1.4 docs.
The `flink.conf` file in
https://svn.apache.org/repos/infra/infrastructure/buildbot/aegis/buildmaster/master1/projects
contains the builder config. I've introduced @twalthr into the ugly details of
it a few weeks ago, maybe he can look into it.
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