diff --git a/pkgs/tools/security/rng-tools/default.nix b/pkgs/tools/security/rng-tools/default.nix
index 3c99b22c1e1..446e25772f1 100644
--- a/pkgs/tools/security/rng-tools/default.nix
+++ b/pkgs/tools/security/rng-tools/default.nix
@@ -16,6 +16,8 @@ stdenv.mkDerivation rec {
 
     license = stdenv.lib.licenses.gpl2;
 
+    platforms = stdenv.lib.platforms.linux;
+
     maintainers = [ stdenv.lib.maintainers.shlevy ];
   };
 }