Update README.md

Author: ceremcem

doc/on-windows/README.md

@@ -7,15 +7,11 @@
 2. In MSYS2 console: 
 
         pacman -Syu
-        pacman -S make git python python-pip
+        pacman -S make git python python-pip tmux
 
 3. Use any command in the MSYS2 command prompt.
 
-4. PATCH nodeenv: https://github.com/ekalinin/nodeenv/pull/238
-
-    #  nano `python -c "import nodeenv; print(nodeenv.__file__)"`
-    - is_CYGWIN = platform.system().startswith('CYGWIN')
-    + is_CYGWIN = platform.system().startswith(('CYGWIN', 'MSYS'))
+4. PATCH nodeenv: https://github.com/ekalinin/nodeenv/pull/263
 
 5. Optional: Apply MSYS2 "Open Here" settings (execute `msys2-here.reg`).