/usr/lib/guestfs/packagelist is in libguestfs0 1:1.14.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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btrfs-tools
cryptsetup
diff
e2fsprogs
gfs-tools
gfs2-tools
grub-pc
hfsplus
iproute
libaugeas0
linux-image
nilfs-tools
ntfs-3g
ntfsprogs
reiserfsprogs
udev
ufsutils
util-linux
vim-tiny
xz-utils
zfs-fuse
acl
attr
bash
binutils
coreutils
cpio
dosfstools
file
findutils
gawk
grep
gzip
jfsutils
libxml2
lsof
lvm2
lzop
mdadm
module-init-tools
net-tools
parted
procps
scrub
strace
tar
zerofree
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