diff --git a/pkg/dpkg/gbootroot.postinst b/pkg/dpkg/gbootroot.postinst
index e4a3686..a59c075 100644
--- a/pkg/dpkg/gbootroot.postinst
+++ b/pkg/dpkg/gbootroot.postinst
@@ -1,7 +1,9 @@
 #!/bin/sh
 
-mknod /usr/share/gbootroot/yard/Replacements/dev/ubd0 b 98 0
 
+if [ ! -e /usr/share/gbootroot/yard/Replacements/dev/ubd0 ]; then 
+    mknod /usr/share/gbootroot/yard/Replacements/dev/ubd0 b 98 0
+fi
 
 if [ "$1" = "configure" ]; then
    if [ -d /usr/doc -a ! -e /usr/doc/gbootroot -a -d /usr/share/doc/gbootroot ]; then