diff -ruN portage-prefix-2.1.14.orig/configure.in portage-prefix-2.1.14/configure.in
--- portage-prefix-2.1.14.orig/configure.in	2006-07-13 11:08:56.000000000 +0200
+++ portage-prefix-2.1.14/configure.in	2006-07-13 11:09:50.000000000 +0200
@@ -9,10 +9,22 @@
 dnl AC_ARG_VAR(portagegroup, the group that portage will operate under [defaults to 'portage'])
 
 case "${prefix}" in
-	'') 	AC_MSG_ERROR([bad value ${prefix} for --prefix, must not be empty]) ;;
-	*/)		AC_MSG_ERROR([bad value ${prefix} for --prefix, must not end with '/']) ;;
+	'') 	AC_MSG_ERROR([bad value '${prefix}' for --prefix, must not be empty]) ;;
+	*/)		AC_MSG_ERROR([bad value '${prefix}' for --prefix, must not end with '/']) ;;
 	/*|NONE) ;;
-	*) 		AC_MSG_ERROR([bad value ${prefix} for --prefix, must start with /]) ;;
+	*) 		AC_MSG_ERROR([bad value '${prefix}' for --prefix, must start with /]) ;;
+esac
+
+AC_ARG_WITH(offset-prefix, 
+AC_HELP_STRING([--with-offset-prefix], [specify the installation prefix for all packages , defaults to '']),
+[DOMAIN_PREFIX=$withval],
+[DOMAIN_PREFIX=''])
+
+case "${DOMAIN_PREFIX}" in
+	'') ;;
+	*/)		AC_MSG_ERROR([bad value '${DOMAIN_PREFIX}' for --with-offset-prefix, must not end with /]) ;;
+	/*) ;;
+	*)		AC_MSG_ERROR([bad value '${DOMAIN_PREFIX}' for --with-offset-prefix, must start with /]) ;;
 esac
 
 AC_CANONICAL_BUILD
@@ -195,11 +207,6 @@
 	AC_MSG_ERROR([error finding the user id of ${rootuser}])
 fi
 
-AC_ARG_WITH(offset-prefix, 
-AC_HELP_STRING([--with-offset-prefix], [specify the installation prefix for all packages , defaults to /]),
-[DOMAIN_PREFIX=$withval],
-[DOMAIN_PREFIX='/'])
-
 DEFAULT_PATH="${DOMAIN_PREFIX}/usr/bin:${DOMAIN_PREFIX}/usr/sbin:${DOMAIN_PREFIX}/bin:${DOMAIN_PREFIX}/sbin:${prefix}/bin"
 AC_ARG_WITH(default-path, 
 AC_HELP_STRING([--with-default-path], [specify the PATH available to the portage build environment ]),