still install a few packages in docker unminimize

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.529~ppa1manpages1) cosmic; urgency=medium
+
+  * Test build.
+
+ -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Tue, 05 Jun 2018 14:19:17 +1200
+
 livecd-rootfs (2.528) cosmic; urgency=medium
 
   * Don't divert grub-probe; otherwise we're missing the filesystem UUIDs that

live-build/auto/build

@@ -158,8 +158,14 @@ rm -f /usr/bin/man
 dpkg-divert --quiet --remove --rename /usr/bin/man
 EOF
 
-                if [ "$PROJECT" != "ubuntu-base" ]; then
+                if [ "$PROJECT" = "ubuntu-base" ]; then
-                    	# The ubuntu-base unminimizer should not install ubuntu-minimal, but others should.
+                    	# ubuntu-minimal is too much for a docker container (it contains
+                    	# e.g. systemd) but we should restore at least a few common things.
+	                cat >> chroot/usr/local/sbin/unminimize <<'EOF'
+apt-get install -y less man-db iproute2 vim-tiny
+EOF
+                else
+                    	# Other unminimizers install more.
 	                cat >> chroot/usr/local/sbin/unminimize <<'EOF'
 
 if ! dpkg-query --show --showformat='${db:Status-Status}\n' ubuntu-minimal 2> /dev/null | grep -q '^installed$'; then