diff --git a/arch-nspawn.in b/arch-nspawn.in
index e68e2e75..461154eb 100644
--- a/arch-nspawn.in
+++ b/arch-nspawn.in
@@ -60,8 +60,7 @@ fi
 
 pacconf_cmd=$(command -v pacman-conf || command -v pacconf)
 # shellcheck disable=2016
-host_mirrors=($($pacconf_cmd --repo extra Server 2> /dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#'))
-# shellcheck disable=2016
+host_mirrors=($($pacconf_cmd ${pac_conf+--conf $pac_conf} --repo extra Server 2> /dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#'))
 
 # {{{ functions
 build_mount_args() {