doc: fixed cmd syntax
@@ -169,7 +169,7 @@ $ pyinstaller --onefile service_win32.spec
**Build NSIS installer:**
```shell
$ git clone ... && cd mamonsu && py setup_win32.py py2exe
-$ makensis packaging/win/mamonsu.nsis
+$ makensis packaging\win\mamonsu.nsis
```
## Installation
