* QA Notice: .desktop files with MimeType= were found installed * but desktop mimeinfo cache has not been updated: * /usr/share/applications/mupdf.desktop * Please make sure to call xdg_desktop_database_update() * in pkg_postinst() and pkg_postrm() phases of appropriate pkgs.
Based on contents of ebuilds, problem was probably fixed in app-text/mupdf-1.12.0 which started to use xdg.eclass: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a4a4dfe71cde92b2eaa38c774d19eeb002d00236 xdg_pkg_preinst() sets XDG_ECLASS_DESKTOPFILES array and xdg_pkg_postinst() calls xdg_desktop_database_update() if this array is non-empty.