diff --git a/src/backend/launcher.ts b/src/backend/launcher.ts
index b28fa4cfeb..7ab51a9005 100644
--- a/src/backend/launcher.ts
+++ b/src/backend/launcher.ts
@@ -493,6 +493,10 @@ function setupWineEnvVars(
       break
     case 'crossover':
       ret.CX_BOTTLE = wineCrossoverBottle
+      break
+    case 'toolkit':
+      ret.WINEPREFIX = winePrefix
+      break
   }
   if (gameSettings.showFps) {
     isMac ? (ret.MTL_HUD_ENABLED = '1') : (ret.DXVK_HUD = 'fps')