-# of the bibtex/mjotex files listed in in $(BIBS)/$(MJOTEX).
-BIBPATHS = $(shell kpsewhich $(BIBS))
-MJOTEXPATHS = $(shell kpsewhich $(MJOTEX))
+# of the bibtex/mjotex files listed in in $(BIBS)/$(MJOTEX). The SRCS
+# variable should contain all (Bib)TeX source files for the document.
+SRCS = $(PN).tex $(shell kpsewhich $(BIBS)) $(shell kpsewhich $(MJOTEX))