diff --git a/tools/build_release.ps1 b/tools/build_release.ps1
index a51fad9d..bcb2ca2f 100644
--- a/tools/build_release.ps1
+++ b/tools/build_release.ps1
@@ -28,7 +28,7 @@ function Arch
 
 function ReleaseName
 {
-  "$appName-$(Version)-win$(Arch)"
+  "$appName-$(Version)-win$env:arch"
 }
 
 function Archive