Move cache dir to /var/cache/devstack
diff --git a/build_nfs.sh b/build_nfs.sh
index 185d0ad..651bae2 100755
--- a/build_nfs.sh
+++ b/build_nfs.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 PROGDIR=`dirname $0`
-CHROOTCACHE=${CHROOTCACHE:-/root/cache}
+CHROOTCACHE=${CHROOTCACHE:-/var/cache/devstack}
 
 # Source params
 source ./stackrc