diff --git a/util/vm/build.py b/util/vm/build.py
index ad454f0..a921aaa 100755
--- a/util/vm/build.py
+++ b/util/vm/build.py
@@ -61,10 +61,10 @@ Prompt = '\$ '              # Shell prompt that pexpect will wait for
 isoURLs = {
     'precise32server':
     'http://mirrors.kernel.org/ubuntu-releases/12.04/'
-    'ubuntu-12.04.3-server-i386.iso',
+    'ubuntu-12.04.5-server-i386.iso',
     'precise64server':
     'http://mirrors.kernel.org/ubuntu-releases/12.04/'
-    'ubuntu-12.04.3-server-amd64.iso',
+    'ubuntu-12.04.5-server-amd64.iso',
     'quantal32server':
     'http://mirrors.kernel.org/ubuntu-releases/12.10/'
     'ubuntu-12.10-server-i386.iso',
@@ -238,7 +238,7 @@ def extractKernel( image, flavor, imageDir=VMImageDir ):
     # Assume kernel is in partition 1/boot/vmlinuz*generic for now
     part = nbd + 'p1'
     mnt = mkdtemp()
-    srun( 'mount -o ro %s %s' % ( part, mnt  ) )
+    srun( 'mount -o ro,noload %s %s' % ( part, mnt  ) )
     kernsrc = glob( '%s/boot/vmlinuz*generic' % mnt )[ 0 ]
     initrdsrc = glob( '%s/boot/initrd*generic' % mnt )[ 0 ]
     srun( 'cp %s %s' % ( initrdsrc, initrd ) )