diff --git a/contrib/packaging/inno/readme.rst b/contrib/packaging/inno/readme.rst
--- a/contrib/packaging/inno/readme.rst
+++ b/contrib/packaging/inno/readme.rst
@@ -34,7 +34,7 @@
 Next, invoke ``packaging.py`` to produce an Inno installer. You will
 need to supply the path to the Python interpreter to use.::
 
-   $ python3.exe contrib\packaging\packaging.py \
+   $ py -3 contrib\packaging\packaging.py \
        inno --python c:\python27\python.exe
 
 .. note::
diff --git a/contrib/packaging/wix/readme.rst b/contrib/packaging/wix/readme.rst
--- a/contrib/packaging/wix/readme.rst
+++ b/contrib/packaging/wix/readme.rst
@@ -40,7 +40,7 @@
 Next, invoke ``packaging.py`` to produce an MSI installer. You will need
 to supply the path to the Python interpreter to use.::
 
-   $ python3 contrib\packaging\packaging.py \
+   $ py -3 contrib\packaging\packaging.py \
       wix --python c:\python27\python.exe
 
 .. note::