diff --git a/pkgs/tools/security/tboot/default.nix b/pkgs/tools/security/tboot/default.nix
index 86c4d96e97d..7c67ebb16b1 100644
--- a/pkgs/tools/security/tboot/default.nix
+++ b/pkgs/tools/security/tboot/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     homepage    = http://sourceforge.net/projects/tboot/;
     license     = licenses.bsd3;
     maintainers = [ maintainers.ak ];
-    platforms   = platforms.linux;
+    platforms   = [ "x86_64-linux" ]; # doesn't build on i686 and maybe pointless there
   };
 }