--- a/README.md	Tue Mar 03 12:48:31 2015 +0200
+++ b/README.md	Tue Mar 03 12:55:17 2015 +0200
@@ -238,25 +238,62 @@
 
 Use the *update* script to generate a complete set of output zonefiles:
 
-    $ ./bin/update
+    $ ./bin/update -C
+      var: apply dir
+      var/dhcp: apply dir
+      var/zones: apply dir
+      var/include-cache: apply dir
+      var/serials: apply dir
+      var/dhcp/hosts: apply dir
+      var/zones/includes: apply dir
+      var/zones/forward: apply dir
+      var/zones/reverse: apply dir
     Commit...
-    Using commit timestamp: 1425049508
+    Using commit timestamp: 1425379711
     Updating forward host zones...
-      var/zones/forward/test: Generating forward hosts zone: etc/zones/forward/test/
+      var/zones/forward/test: Generating forward hosts zone: etc/zones/forward/test
     Updating reverse host zones...
-      var/zones/reverse/192.0.2: Generating reverse hosts zone: etc/zones/reverse/192.0.2/
+      var/zones/reverse/192.0.2: Generating reverse hosts zone: etc/zones/reverse/192.0.2
     Updating DHCP hosts...
     Copying zone includes...
     Updating zones...
-      var/serials/test: Update serial: 1425049508 <- 1425049508
-      var/zones/test: Generate zone: etc/zones/test
+      var/serials/test: Update serial:  <- 1425379711
+      var/zones/test: Generate zone: etc/zones/test @ 1425379711
     Updating DHCP confs...
     Testing zones...
     Reload zones...
       Reload zones
-            rndc: server reload successful
+     * Reloading domain name service... bind9 [ OK ] 
     Testing DHCP...
     Reload DHCP...
+      Reload DHCP
+    isc-dhcp-server stop/waiting
+    isc-dhcp-server start/running, process 32581
+
+The update script tracks hostfile/zonefile dependencies, and only updates the necessary output files:
+
+    $ touch etc/hosts/test.d/foo && ./bin/update -C
+    Commit...
+    Using commit timestamp: 1425379801
+    Updating forward host zones...
+      var/zones/forward/test: Generating forward hosts zone: etc/zones/forward/test
+    Updating reverse host zones...
+      var/zones/reverse/192.0.2: Generating reverse hosts zone: etc/zones/reverse/192.0.2
+    Updating DHCP hosts...
+    Copying zone includes...
+    Updating zones...
+      var/serials/test: Update serial: 1425379801 <- 1425379801
+      var/zones/test: Generate zone: etc/zones/test @ 1425379801
+    Updating DHCP confs...
+    Testing zones...
+    Reload zones...
+      Reload zones
+     * Reloading domain name service... bind9 ...done.
+    Testing DHCP...
+    Reload DHCP...
+      Reload DHCP
+    isc-dhcp-server stop/waiting
+    isc-dhcp-server start/running, process 775
 
 ## Output zone files