--- a/common/autoconf/basics_windows.m4	Wed Jul 05 20:31:05 2017 +0200
+++ b/common/autoconf/basics_windows.m4	Tue May 05 12:45:54 2015 +0200
@@ -320,8 +320,8 @@
     WINDOWS_ENV_VENDOR='cygwin'
     WINDOWS_ENV_VERSION="$CYGWIN_VERSION"
 
-    CYGWIN_VERSION_OK=`$ECHO $CYGWIN_VERSION | $GREP ^1.7.`
-    if test "x$CYGWIN_VERSION_OK" = x; then
+    CYGWIN_VERSION_OLD=`$ECHO $CYGWIN_VERSION | $GREP -e '^1\.[0-6]'`
+    if test "x$CYGWIN_VERSION_OLD" != x; then
       AC_MSG_NOTICE([Your cygwin is too old. You are running $CYGWIN_VERSION, but at least cygwin 1.7 is required. Please upgrade.])
       AC_MSG_ERROR([Cannot continue])
     fi