Selecting previously unselected package steam-launcher.
(Reading database ... 214311 files and directories currently installed.)
Preparing to unpack .../Downloads/steam_latest.deb ...
Unpacking steam-launcher (1:1.0.0.67) ...
Processing triggers for lastore-daemon (5.0.7+c2-1) ...
Processing triggers for desktop-file-utils (0.23-4) ...
Processing triggers for bamfdaemon (0.5.4-1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.62) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
An error occurred while applying changes: dpkg: dependency problems prevent configuration of steam-launcher:
steam-launcher depends on python3-apt; however:
Package python3-apt is not installed.
steam-launcher depends on zenity; however:
Package zenity is not installed.

dpkg: error processing package steam-launcher (--install):
dependency problems - leaving unconfigured
/usr/bin/mandb: can't open /usr/share/man/man3/fnmatch.3am.gz: Permission denied
Errors were encountered while processing:
steam-launcher

求教各位大佬