build-sys: default to "" as rootprefix

diff --git a/configure.ac b/configure.ac
index d0bdeb44b34b5b51030f00ed72645c8607c01ecf..3de639b5fc3f7a9c39e2f1a30140467e6156828b 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@ required_private_libs=""
 
 AC_ARG_WITH([rootprefix],
         AS_HELP_STRING([--with-rootprefix=DIR], [rootfs directory prefix for config files and kernel modules]),
-        [], [with_rootprefix=$prefix])
+        [], [with_rootprefix=""])
 AC_SUBST([rootprefix], [$with_rootprefix])
 
 AC_ARG_ENABLE([tools],