diff --git a/wxPython/b.bat b/wxPython/b.bat
index a6404c9af8..afe0718200 100755
--- a/wxPython/b.bat
+++ b/wxPython/b.bat
@@ -6,13 +6,16 @@ set FLAGS=USE_SWIG=1 IN_CVS_TREE=1
 
 rem  Use non-default python?
 iff "%1" == "15" .or. "%1" == "20" .or. "%1" == "21" then
-	set SETUP=c:\tools\python%1%\python.exe -u setup.py
+	set PYTHON=c:\tools\python%1%\python.exe
 	shift
 else
-	set SETUP=python -u setup.py
+	set PYTHON=python
 endiff
+set SETUP=%PYTHON% -u setup.py
 
 
+%PYTHON% -c "import sys;print '\n', sys.version, '\n'"
+
 
 rem "c" --> clean
 iff "%1" == "c" then