/usr/lib/ghc-doc/hoogle/libghc-pipes-bytestring-doc.txt is in libghc-pipes-bytestring-doc 2.1.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-pipes-bytestring-doc/html/pipes-bytestring.txt