diff --git a/pkgs/pngpaste/systems.nix b/pkgs/pngpaste/systems.nix
index 3ae6942..f6090f8 100644
--- a/pkgs/pngpaste/systems.nix
+++ b/pkgs/pngpaste/systems.nix
@@ -1,2 +1,2 @@
 { lib, hostPlatform, targetPlatform, ... }:
-targetPlatform.isDarwin
+hostPlatform.isDarwin && targetPlatform.isDarwin