- do not mount block devices via loop device

diff --git a/build b/build
index 70c1b36..636549c 100755 (executable)
--- a/build
+++ b/build
@@ -1184,7 +1184,12 @@ if test -z "$RUNNING_IN_VM" ; then
        fi
        mkdir_build_root
        if [ -w /root ]; then
-           mount -o loop $VM_IMAGE $BUILD_ROOT || cleanup_and_exit 3
+            if blkid $VM_IMAGE >& /dev/null; then
+                # mount device directly
+               mount $VM_IMAGE $BUILD_ROOT || cleanup_and_exit 3
+           else
+               mount -o loop $VM_IMAGE $BUILD_ROOT || cleanup_and_exit 3
+            fi
        else
            if ! mount $BUILD_ROOT; then
                echo "mounting the build root failed. An fstab entry is probably missing or incorrect."