INFO: setup
Package:    app-arch/file-roller-44.1:0
Repository: gentoo
Maintainer: gnome@gentoo.org
USE:        abi_x86_64 amd64 elibc_glibc introspection kernel_linux
FEATURES:   preserve-libs sandbox userpriv usersandbox
INFO: install
Final size of build directory: 19584 KiB (19.1 MiB)
Final size of installed tree:   5508 KiB ( 5.3 MiB)
INFO: postinst
Updating .desktop files database ...
Updating icons cache ...
Updating GSettings schemas ...
LOG: postinst

file-roller is a frontend for several archiving utilities. If you want a
particular archive format support, see https://wiki.gnome.org/Apps/FileRoller
and install the relevant package. For example:
7-zip   - app-arch/p7zip
ace     - app-arch/unace
arj     - app-arch/arj
brotli  - app-arch/brotli
cpio    - app-alternatives/cpio
deb     - app-arch/dpkg
iso     - app-cdr/cdrtools
jar,zip - app-arch/zip and app-arch/unzip
lha     - app-arch/lha
lzop    - app-arch/lzop
lz4     - app-arch/lz4
rar     - app-arch/unrar or app-arch/unar
rpm     - app-arch/rpm
unstuff - app-arch/stuffit
zstd    - app-arch/zstd
zoo     - app-arch/zoo

(Note: Above message is only printed the first time package is
installed. Please look at /usr/share/doc/file-roller-44.1/README.gentoo*
for future reference)