[docs, devscripts] Document `pyinst`'s argument passthrough (#5235)

Closes #4631
Authored by: jahway603

diff --git a/README.md b/README.md
index 5890004565b0050d292ffbde0f7f250a0348c86c..a306b199e94ba2705f7b2651f84ee7304ddd2d19 100644 (file)
--- a/README.md
+++ b/README.md
@@ -277,6 +277,8 @@ ### Standalone PyInstaller Builds
 
 On some systems, you may need to use `py` or `python` instead of `python3`.
 
+`pyinst.py` accepts any arguments that can be passed to `pyinstaller`, such as `--onefile/-F` or `--onedir/-D`, which is further [documented here](https://pyinstaller.org/en/stable/usage.html#what-to-generate).
+
 Note that pyinstaller with versions below 4.4 [do not support](https://github.com/pyinstaller/pyinstaller#requirements-and-tested-platforms) Python installed from the Windows store without using a virtual environment.
 
 **Important**: Running `pyinstaller` directly **without** using `pyinst.py` is **not** officially supported. This may or may not work correctly.