diff -r e0a651547bd2 -r 76ed62924d50 lib/pvl/hosts/zone.sh
--- a/lib/pvl/hosts/zone.sh	Tue Mar 03 12:08:58 2015 +0200
+++ b/lib/pvl/hosts/zone.sh	Tue Mar 03 12:09:22 2015 +0200
@@ -13,16 +13,18 @@
 function update_hosts_forward {
     local out="$1"
     local src="$2"
-    local srcs=($(list_tree $src))
     local msg="$out: Generating forward hosts zone: $src"
+    local include_cache=$(include_cache_path $src)
+    local srcs=($(include_cache $include_cache))
 
-    if apply_check "$out" "${srcs[@]}"; then
+    if apply_check "$out" ${srcs[@]:-}; then
         log_skip "$msg"
     else
         log_apply "$msg"
     
         apply_cmd "$out" $OPT/bin/pvl.hosts-forward \
-            --hosts-include="$HOSTS_INCLUDE" \
+            --hosts-include=$HOSTS_INCLUDE \
+            --hosts-include-trace=$include_cache \
              "$src"
     fi
 }
@@ -33,16 +35,18 @@
 function update_hosts_reverse {
     local out="$1"
     local src="$2"
-    local srcs=($(list_tree $src))
     local msg="$out: Generating reverse hosts zone: $src"
+    local include_cache=$(include_cache_path $src)
+    local srcs=($(include_cache $include_cache))
 
-    if apply_check "$out" "${srcs[@]}"; then
+    if apply_check "$out" ${srcs[@]:-}; then
         log_skip "$msg"
     else
         log_apply "$msg"
     
         apply_cmd "$out" $OPT/bin/pvl.hosts-reverse \
             --hosts-include="$HOSTS_INCLUDE" \
+            --hosts-include-trace=$include_cache \
              "$src"
     fi
 }