diff --git a/lib/meta.nix b/lib/meta.nix
index ad4f770806dd..ee234d94489b 100644
--- a/lib/meta.nix
+++ b/lib/meta.nix
@@ -289,8 +289,7 @@ rec {
   */
   availableOn =
     platform: pkg:
-    pkg != null
-    && ((!pkg ? meta.platforms) || any (platformMatch platform) pkg.meta.platforms)
+    ((!pkg ? meta.platforms) || any (platformMatch platform) pkg.meta.platforms)
     && all (elem: !platformMatch platform elem) (pkg.meta.badPlatforms or [ ]);
 
   /**