diff --git a/arch-nspawn.in b/arch-nspawn.in
index c21b2ce..bc9beb7 100644
--- a/arch-nspawn.in
+++ b/arch-nspawn.in
@@ -59,7 +59,7 @@ else
 fi
 
 # shellcheck disable=2016
-host_mirror=$(pacman --cachedir /doesnt/exist -Sddp extra/devtools 2>/dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#')
+host_mirror=$(pacman --config "${pac_conf:-$working_dir/etc/pacman.conf}" --dbpath "$working_dir/var/lib/pacman" --cachedir /doesnt/exist -Sddp extra/devtools 2>/dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#')
 # shellcheck disable=2016
 [[ $host_mirror == *file://* ]] && host_mirror_path=$(echo "$host_mirror" | sed -r 's#file://(/.*)/\$repo/os/\$arch#\1#g')