README.WINDOWS: clarify how to build master branch

diff --git a/README.WINDOWS b/README.WINDOWS
index 0c6f37405d68eb3c1e602e034cff9891ae7561a2..ad03e1650bd7a8fdd642d1cf08324a43c009d392 100644 (file)
--- a/README.WINDOWS
+++ b/README.WINDOWS
@@ -157,11 +157,12 @@ install the following additional Cygwin packages:
     - wget          (category "Web")
 
 Then, in a Cygwin terminal, clone the git repository, checkout the wimlib
-version you want, bootstrap the repository, and run the Windows release script:
+version you want (if you don't want to build the latest master branch),
+bootstrap the repository, and run the Windows release script:
 
     git clone git://wimlib.net/wimlib
     cd wimlib
-    git checkout v1.13.0
+    git checkout v1.13.0  # example only; omit if building the master branch
     ./bootstrap
     ./tools/make-windows-release x86_64