diff --git a/pkgs/tools/security/tcb/default.nix b/pkgs/tools/security/tcb/default.nix
index b49f7767dcb..6a1f5b5eb5f 100644
--- a/pkgs/tools/security/tcb/default.nix
+++ b/pkgs/tools/security/tcb/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     '';
     homepage = "https://www.openwall.com/tcb/";
     license = licenses.bsd3;
-    platforms = platforms.linux;
+    platforms = systems.inspect.patterns.isGnu;
     maintainers = with maintainers; [ izorkin ];
   };
 }