diff --git a/src/get-facts.sh b/src/get-facts.sh
index e23bb43..cc79f69 100755
--- a/src/get-facts.sh
+++ b/src/get-facts.sh
@@ -11,7 +11,7 @@ is_kexec=$(if test -f /etc/is_kexec; then echo "y"; else echo "n"; fi)
 is_nixos=$is_nixos
 is_installer=$(if [ "$is_nixos" = "y" ] && grep -q VARIANT_ID=installer /etc/os-release; then echo "y"; else echo "n"; fi)
 is_container=$(if [ "$(has systemd-detect-virt)" = "y" ]; then systemd-detect-virt --container; else echo "none"; fi)
-has_ipv6_only=$(if [[ "$(has ip)" == "n" ]] || ip r g 1 >/dev/null 2>/dev/null || ! ip -6 r g :: >/dev/null 2>/dev/null; then echo "n"; else echo "y"; fi)
+has_ipv6_only=$(if [ "$(has ip)" = "n" ] || ip r g 1 >/dev/null 2>/dev/null || ! ip -6 r g :: >/dev/null 2>/dev/null; then echo "n"; else echo "y"; fi)
 has_tar=$(has tar)
 has_sudo=$(has sudo)
 has_doas=$(has doas)