/usr/share/doc/libghc-unix-compat-prof/changelog.Debian.gz is in libghc-unix-compat-prof 0.4.3.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libghc-unix-compat-prof/../libghc-unix-compat-dev/changelog.Debian.gz