pve-admin-guide.epub \
$(sort $(addsuffix .html, ${MANUAL_PAGES}) ${CHAPTER_LIST})
-ADOC_STDARG= -a icons -a data-uri -a "date=$(shell date)" -a "revnumber=${DOCRELEASE}"
+ADOC_STDARG= -b html5 -a icons -a data-uri -a "date=$(shell date)" -a "revnumber=${DOCRELEASE}"
BROWSER?=xdg-open