packaging of docbook-xsl.
# value of ZIP_EXCLUDES is a space-separated list of any file or
# directory names (shell wildcards OK) that should be excluded
# from the zip file and tarball for the release
-DISTRIB_EXCLUDES = extensions/xsltproc doc/reference.txt$$ reference.txt.html$$ doc/reference.fo$$ doc/reference.pdf$$
+DISTRIB_EXCLUDES = extensions/xsltproc doc/reference.txt$$ reference.txt.html$$ doc/reference.fo$$ doc/reference.pdf$$ tools/xsl
# value of DISTRIB_PACKAGES is a space-separated list of any
# directory names that should be packaged as separate zip/tar