diff --git a/nixng/containers/hydra/hydra.nix b/nixng/containers/hydra/hydra.nix
index 6f52a74..51ddeea 100644
--- a/nixng/containers/hydra/hydra.nix
+++ b/nixng/containers/hydra/hydra.nix
@@ -34,6 +34,7 @@ makeSystem {
 
             builders-use-substitutes = true;
             builders = "@/etc/nix/machines";
+            extra-platforms = [ "i686-linux" "aarch64-linux" ];
           };
         };
         services.hydra = {
@@ -94,6 +95,8 @@ makeSystem {
           let
             machines = pkgs.writeText "machines" ''
               eu.nixbuild.net x86_64-linux - 100 5 benchmark,big-parallel
+              eu.nixbuild.net aarch64-linux - 100 5 benchmark,big-parallel
+              eu.nixbuild.net i686-linux - 100 5 benchmark,big-parallel
             '';
             nix-machines = nglib.dag.dagEntryAnywhere ''
               export PATH=${pkgs.busybox}/bin