--- /dev/null
+--- a/squashfs-tools/version.sh
++++ b/squashfs-tools/version.sh
+@@ -27,13 +27,11 @@ if [ -z "$OUTPUT" ] ; then
+ fi
+
+ our_date() {
+-case $(uname) in
+-NetBSD|OpenBSD|DragonFly|FreeBSD|Darwin)
+- date -r "$1" "$2"
+- ;;
+-*)
+- date -d "@$1" "$2"
+-esac
++ if date --version 2>&1 | grep -q "GNU coreutils"; then
++ date -d "@$1" "$2"
++ else
++ date -r "$1" "$2"
++ fi
+ }
+
+ try_version() {