--- Makefile.am.orig	2017-06-14 12:28:48.301704029 +0200
+++ Makefile.am	2017-06-14 12:29:58.274534178 +0200
@@ -1664,8 +1664,8 @@
 html:
 	mkdir -p $(top_builddir)/html/
 	mkdir -p $(top_builddir)/html/{developer-docs,user-docs}
-	xsltproc --output $(top_builddir)/html/user-docs/ --xinclude /usr/share/xml/docbook/stylesheet/docbook-xsl/htmlhelp/htmlhelp.xsl $(top_srcdir)/docs/usersBook.xml
-	xsltproc --output $(top_builddir)/html/developer-docs/ --xinclude /usr/share/xml/docbook/stylesheet/docbook-xsl/htmlhelp/htmlhelp.xsl $(top_srcdir)/docs/developersBook.xml
+	xsltproc --output $(top_builddir)/html/user-docs/ --xinclude /usr/share/sgml/docbook/xsl-stylesheets/htmlhelp/htmlhelp.xsl $(top_srcdir)/docs/usersBook.xml
+	xsltproc --output $(top_builddir)/html/developer-docs/ --xinclude /usr/share/sgml/docbook/xsl-stylesheets/htmlhelp/htmlhelp.xsl $(top_srcdir)/docs/developersBook.xml
 	$(MAKE) -C $(top_srcdir)/docs/reference/libags
 	cd $(top_srcdir)
 	$(MAKE) -C $(top_srcdir)/docs/reference/libags-audio