-$(srcdir)/doc/help-pages-list: $(UI_FILES)
- cat $^ | grep '"help-page"' | \
- sed -e 's% *<property name="help-page">\([^<]*\)</property>%//*[@id='"'"'\1'"'"']%' \
+$(top_srcdir)/doc/help-pages-list: $(UI_FILES)
+ cat $^ | grep '"help[-_]page"' | \
+ $(SED) -e 's% *<property name="help[-_]page">\([^<]*\)</property>%//*[@id='"'"'\1'"'"']%' \