--- configure.ac	2016-07-25 15:08:36.000000000 +0800
+++ configure_ricky.ac	2016-10-20 13:46:29.466294000 +0800
@@ -625,6 +625,11 @@
     opsys=cygwin
   ;;
 
+  ## MSYS2 ports
+  *-*-msys )
+    opsys=cygwin
+  ;;
+
   ## HP 9000 series 700 and 800, running HP/UX
   hppa*-hp-hpux10.2* )
     opsys=hpux10-20