Say explicitly this is not for Cygwin.

diff --git a/nt/INSTALL b/nt/INSTALL
index 2e8349bb3f3aa0637ddb910eaa6a01b5a9868d74..dc88bfd99755d5a5efd7892bee59c8fdc3c884c0 100644 (file)
--- a/nt/INSTALL
+++ b/nt/INSTALL
@@ -11,6 +11,9 @@
   native Windows binary of Emacs, for those who want to skip the
   complex explanations and ``just do it'':
 
+  Do not use this recipe with Cygwin.  For building on Cygwin,
+  use the normal installation instructions, ../INSTALL.
+
   1. Change to the `nt' directory (the directory of this file):
 
        cd nt