When man-db.filetrigger is executing, if xz is not installed, it prints following error message (a lot of times): mandb: can't execute xz: No such file or directory
man-db-2.9.0-alt3 -> sisyphus: Sun May 03 2020 Vladimir D. Seleznev <vseleznv@altlinux> 2.9.0-alt3 - NMU: Add missing requires: xz (ALT#38217).