diff --git a/3rdparty/kallisti5/mksysroot.sh b/3rdparty/kallisti5/mksysroot.sh
new file mode 100755
index 0000000000..477769455c
--- /dev/null
+++ b/3rdparty/kallisti5/mksysroot.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+#
+# Creates a sysroot from a running Haiku system suitable
+# for bootstrapping / cross-compiling Haiku applications
+# under other platforms.
+#
+# Resulting tar.gz is generally extracted at cross-tools-$ARCH/sysroot
+#
+
+OS=$(uname -o)
+ARCH=$(uname -p)
+REV=$(uname -v | awk '{ print $1 }')
+
+EXCLUDE="/boot/system/packages /boot/system/var/swap"
+
+OUTPUT="sysroot-$OS-$ARCH-$REV.tar.gz"
+
+echo "Generating $ARCH sysroot..."
+
+tar $(for i in $EXCLUDE; do echo "--exclude $i"; done) -cvzf $OUTPUT /boot/system /bin /etc /packages /system /tmp
+
+if [ $? -ne 0 ]; then
+	echo "Error creating sysroot package!"
+	return 1;
+fi
+
+echo "sysroot $OUTPUT successfully created!"