/usr/share/doc/libghc-unix-bytestring-prof/changelog.Debian.gz is in libghc-unix-bytestring-prof 0.3.5.4-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libghc-unix-bytestring-prof/../libghc-unix-bytestring-dev/changelog.Debian.gz