diff --git a/build.gradle.kts b/build.gradle.kts
index bd66a1e..5142760 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -42,5 +42,6 @@ java {
 
 application {
 	mainClass.set("gay.pizza.CavesOfJolk.Program")
-	applicationDefaultJvmArgs = listOf("-XstartOnFirstThread") // Make MacOS happy
+	if (System.getProperty("os.name") == "Mac OS X")
+		applicationDefaultJvmArgs = listOf("-XstartOnFirstThread") // Make MacOS happy
 }