/usr/lib/ghc-doc/hoogle/zeromq3-haskell.txt is in libghc-zeromq3-haskell-doc 0.4-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-zeromq3-haskell-doc/html/zeromq3-haskell.txt