diff --git a/lib/setup.sh b/lib/setup.sh
new file mode 100755
index 0000000..1fd8835
--- /dev/null
+++ b/lib/setup.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+# -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
+source "$(dirname -- "$0")/../load.sh" || exit 1
+
+[ "$(id -u)" -eq 0 ] || die "Ce script doit être lancé avec les droits root"
+
+cd "$MYDIR/.."
+[ -n "$1" ] && dest="$1" || dest="$(pwd)"
+
+estep "Maj /etc/nucore.sh"
+sed "s|@@""dest""@@|$dest|g" load.sh >/etc/nucore.sh
diff --git a/lib/uinst/conf b/lib/uinst/conf
index 5357b00..6f4d212 100644
--- a/lib/uinst/conf
+++ b/lib/uinst/conf
@@ -1,9 +1,6 @@
 # -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
 
 source "$@" || exit 1
-source "$ULIBDIR/ulib" || exit 1
-urequire DEFAULTS
-cd "$scriptdir/../.."
 
 # supprimer les fichiers de VCS
-rm -rf .git
+rm -rf "$srcdir/.git"
diff --git a/lib/uinst/rootconf b/lib/uinst/rootconf
index 0375bfc..bdc0ed3 100644
--- a/lib/uinst/rootconf
+++ b/lib/uinst/rootconf
@@ -1,10 +1,5 @@
 # -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
 
 source "$@" || exit 1
-source "$ULIBDIR/ulib" || exit 1
-urequire DEFAULTS
-cd "$scriptdir/../.."
 
-sed "s|@@""dest""@@|$dest|g" load.sh >/etc/nucore.sh
-
-exit 0
+"$srcdir/lib/setup.sh" "$dest"