Issue #28573: Avoid setting up env too many times during build
diff --git a/PCbuild/build.bat b/PCbuild/build.bat
index 88b1f06..ffcc197 100644
--- a/PCbuild/build.bat
+++ b/PCbuild/build.bat
@@ -120,9 +120,9 @@
     @echo off

     call :Kill

     set conf=PGUpdate

+    set target=Build

 )

 goto Build

-

 :Kill

 echo on

 msbuild "%dir%\pythoncore.vcxproj" /t:KillPython %verbose%^