diff --git a/make-includes/build_misc_rules.make b/make-includes/build_misc_rules.make
index bd48b3b..37bbda6 100755
--- a/make-includes/build_misc_rules.make
+++ b/make-includes/build_misc_rules.make
@@ -65,6 +65,21 @@
 endif
 
 
+#
+# List of XSL stylesheets. If any of these change, we need to rebuild
+# everything. 
+#
+# We can't use the resolver approach under Windows because of the DOS
+# pathnames. The style sheets come out of the resolver with paths like
+# C:\bar\foo\..., and make interprets the colon as an extra dependency
+# delimiter (tested and behaviour verified). Of course, this works fine on
+# any platform with sensible path standards. Quoting the value doesn't
+# help, unfortunately. Bugger :(
+#
+#XSLT_STYLESHEETS:=$(shell java org.apache.xml.resolver.apps.resolver -u file:///xml2html.xsl uri | ( grep 'Result: file:' || echo '::xml2html.xsl' ) | cut -d':' -f3-) $(shell java org.apache.xml.resolver.apps.resolver -u file:///xml2latex.xsl uri | ( grep 'Result: file:' || echo '::xml2latex.xsl' ) | cut -d':' -f3-)
+XSLT_STYLESHEETS:=$(TEACHING_SHARED)/Authoring/XML/xml2html.xsl $(TEACHING_SHARED)/Authoring/XML/xml2latex.xsl
+
+
 ################################################################################
 #
 # Add standard file suffixes.
@@ -192,6 +207,27 @@
 
 ################################################################################
 #
+# Generate the derived XML source from the original XML template.
+# This is done by simply running the original source through xmllint
+# with the --xinclude option to process all the xi:include elements.
+# The result of this could have just been piped into the XSLT processor,
+# except that (a) not all of the processors support input from stdin,
+# and (b) combining both xmllint and XSLT processing into one command
+# means that make won't stop if there's any errors from xmllint.
+#
+# Sed is used to add a comment to the derived XML file, warning that this
+# is generated and shouldn't be edited. Sed was used because the <?xml?>
+# processing instruction MUST be on the first line. The implication here
+# is that all input source files have an <?xml?> processing instruction
+# (which they should anyway).
+#
+$(DERIVED_XML): $(SOURCE_XML) $(XSLT_STYLESHEETS)
+	xmllint --xinclude $< >$@
+	@sed -i -e '1a <!-- THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT! -->' $@
+		
+
+################################################################################
+#
 # Build the test document.
 #
 test: test.pdf