diff --git a/Makefile b/Makefile
index c3e5a70a..4083af88 100644
--- a/Makefile
+++ b/Makefile
@@ -117,7 +117,7 @@ webapp-static: addon-packer
 # When changing the base URL, also update the line
 # e.GET("/app/*", echo.WrapHandler(webAppHandler))
 # in `cmd/flamenco-manager/main.go`
-	yarn --cwd web/app build --outDir ../static --base=/app/ --logLevel warn
+	MSYS2_ARG_CONV_EXCL="*" yarn --cwd web/app build --outDir ../static --base=/app/ --logLevel warn
 # yarn --cwd web/app build --outDir ../static --base=/app/ --minify false
 	./addon-packer -filename ${WEB_STATIC}/flamenco-addon.zip
 	@echo "Web app has been installed into ${WEB_STATIC}"