diff --git a/install_sys.sh b/install_sys.sh
index a7c8140..59ee019 100644
--- a/install_sys.sh
+++ b/install_sys.sh
@@ -30,8 +30,12 @@ cp /etc/resolv.conf $CHROOT/etc/resolv.conf
 mirrorselect -i -c FR -o >> $CHROOT/etc/portage/make.conf #trouver l'astuce pour utiliser les mirroirs les plus rapides
 mkdir $CHROOT/etc/portage/repos.conf
 cp $CHROOT/usr/share/portage/config/repos.conf $CHROOT/etc/portage/repos.conf/gentoo.conf
-# lancer "emerge --config sys-libs/timezone-data" dans le chroot
+chroot /mnt/gentoo /bin/bash -c "emerge --config sys-libs/timezone-data"
 echo "fr_FR.UTF-8 UTF-8" >> $CHROOT/etc/locale.gen
-# lancer "locale-gen" dans le chroot
-echo 'LANG="fr_FR.UTF-8"' > /etc/env.d/02locale
-echo 'LC_COLLATE="C"' >> /etc/env.d/02locale
+chroot $CHROOT /bin/bash -c "locale-gen"
+echo 'LANG="fr_FR.UTF-8"' > $CHROOT/etc/env.d/02locale
+echo 'LC_COLLATE="C"' >> $CHROOT/etc/env.d/02locale
+echo "app-admin/sudo -sendmail" >> $CHROOT/etc/portage/package.use/sudo.use
+chroot $CHROOT /bin/bash -c "emerge sudo"
+echo 'GRUB_PLATFORMS="pc"' >> $CHROOT/etc/portage/make.conf
+echo "sys-boot/grub -fonts -themes" >> $CHROOT/etc/portage/package.use/grub.use
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