AppVeyor doesn't pass the platform env variable?

CI/before_script.msvc.sh

@@ -40,7 +40,7 @@ else
 
 	cd $APPVEYOR_BUILD_FOLDER
 	VERSION="$(cat README.md | grep Version: | awk '{ print $3; }')-$(git rev-parse --short HEAD)"
-	appveyor UpdateBuild -Version "$VERSION"
+	appveyor UpdateBuild -Version "$VERSION" > /dev/null &
 fi
 
 run_cmd() {

appveyor.yml

@@ -40,7 +40,7 @@ cache:
 clone_folder: C:\projects\openmw
 
 before_build:
-    - cmd: sh %APPVEYOR_BUILD_FOLDER%\CI\before_script.msvc.sh -u -v
+    - cmd: sh PLATFORM=%PLATFORM% %APPVEYOR_BUILD_FOLDER%\CI\before_script.msvc.sh -u
 
 build_script:
     - cmd: if %PLATFORM%==Win32 set build=Build_32