diff --git a/archbuild.in b/archbuild.in
index 709d70d..b6d0b56 100644
--- a/archbuild.in
+++ b/archbuild.in
@@ -71,7 +71,7 @@ else
 		-C "@pkgdatadir@/pacman-${repo}.conf" \
 		-M "@pkgdatadir@/makepkg-${arch}.conf" \
 		"${chroots}/${repo}-${arch}/root" \
-		pacman -Syu --noconfirm || abort
+		pacman -Syuu --noconfirm || abort
 fi
 
 # Always build official packages reproducibly
diff --git a/makechrootpkg.in b/makechrootpkg.in
index f69c781..7c3cc93 100644
--- a/makechrootpkg.in
+++ b/makechrootpkg.in
@@ -361,7 +361,7 @@ fi
 
 (( update_first )) && arch-nspawn "$copydir" \
 		"${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \
-		pacman -Syu --noconfirm
+		pacman -Syuu --noconfirm
 
 if [[ -n ${install_pkgs[*]:-} ]]; then
 	install_packages