diff --git a/Mmakefile b/Mmakefile
index ced3f7a03..18dd6e33a 100644
--- a/Mmakefile
+++ b/Mmakefile
@@ -178,6 +178,8 @@ tar: README INSTALL
 	# Package up the mercury directory and the tests directory, 
 	# but with some subdirectories excluded, into a gzipped tar
 	# archive that will unpack into mercury-$(VERSION).
+	# Put the extras directory into a gzipped tar archive that
+	# will unpack into mercury-$(VERSION)-extras.
 	cd .. && (							\
 		mv mercury mercury-$(VERSION);				\
 		mv tests mercury-$(VERSION)/tests;			\
@@ -185,10 +187,14 @@ tar: README INSTALL
 		mv mercury-$(VERSION)/trial	stuff-to-exclude;	\
 		mv mercury-$(VERSION)/bytecode	stuff-to-exclude;	\
 		mv mercury-$(VERSION)/lp_solve	stuff-to-exclude;	\
+		mv mercury-$(VERSION)/extras mercury-$(VERSION)-extras; \
 		tar -cf - mercury-$(VERSION) |				\
 			gzip -9 > mercury-$(VERSION).tar.gz;		\
 		mv stuff-to-exclude/* mercury-$(VERSION);		\
 		rmdir stuff-to-exclude;					\
+		tar -cf - mercury-$(VERSION)-extras |			\
+			gzip -9 > mercury-$(VERSION)-extras.tar.gz;	\
+		mv mercury-$(VERSION)-extras mercury-$(VERSION)/extras; \
 		mv mercury-$(VERSION)/tests tests;			\
 		mv mercury-$(VERSION) mercury				\
 	)
diff --git a/tools/test_mercury b/tools/test_mercury
index 26f0dc36d..959e19a29 100755
--- a/tools/test_mercury
+++ b/tools/test_mercury
@@ -311,7 +311,8 @@ case $HOST in murlibobo)
 	mmake MMAKEFLAGS='EXTRA_MCFLAGS="-O5 --opt-space" -j6' tar &&
 	cd .. &&
 	rm -f mercury-latest-unstable/* &&
-	mv mercury-$version.tar.gz mercury-latest-unstable
+	mv mercury-$version.tar.gz mercury-latest-unstable &&
+	mv mercury-$version-extras.tar.gz mercury-latest-unstable
 	} || status=1
 	;;
 esac
@@ -388,9 +389,13 @@ case $status in
 	    rm -f mercury-latest-stable/* &&
 	    ln mercury-latest-unstable/mercury-$version.tar.gz \
 	        mercury-latest-stable/mercury-$version.tar.gz &&
+	    ln mercury-latest-unstable/mercury-$version-extras.tar.gz
+	        mercury-latest-stable/mercury-$version-extras.tar.gz &&
 	    rm -f /home/tsa/ftp/pub/mercury/beta-releases/mercury-rotd-*.tar.gz
 	    cp mercury-latest-stable/mercury-$version.tar.gz \
 	        /home/tsa/ftp/pub/mercury/beta-releases
+	    cp mercury-latest-stable/mercury-$version-extras.tar.gz \
+	        /home/tsa/ftp/pub/mercury/beta-releases
 	    ;;
 	esac
 	echo "test_mercury exiting successfully at `date`" 1>&2