diff --git a/flake.nix b/flake.nix
index 692572a..3649c26 100644
--- a/flake.nix
+++ b/flake.nix
@@ -169,7 +169,7 @@
       #  file = ./secrets/${hostname}.yaml;
       #  exists = builtins.pathExists file;
       #  yaml = lib.removeAttrs (lib.importYAML file) ["sops"];
-      #  secrets = lib.attrNames yaml;
+      #  secrets = lib.attrNames yaml; # TODO: recurse
       #in
       #  if !exists then {} else lib.mkMerge (lib.forEach secrets (secret:
       #    lib.mkIf (config.sops.secrets ? secret) {
diff --git a/hosts/eple/configuration.nix b/hosts/eple/configuration.nix
index 4cd1f18..f9bb6dc 100644
--- a/hosts/eple/configuration.nix
+++ b/hosts/eple/configuration.nix
@@ -5,6 +5,10 @@
   boot.loader.efi.canTouchEfiVariables = true;
   boot.loader.efi.efiSysMountPoint = "/boot/efi";
 
+  boot.binfmt.emulatedSystems = [
+    "aarch64-linux"
+  ];
+
   services.nfs.server.enable = false; # TODO: remove?
 
   imports = [
diff --git a/hosts/known-hosts.toml b/hosts/known-hosts.toml
index 51b2d88..98ad87d 100644
--- a/hosts/known-hosts.toml
+++ b/hosts/known-hosts.toml
@@ -52,6 +52,7 @@ ssh.proxyJump = "isvegg.pvv.ntnu.no"
 
 ["eple.pbsds.net"] # r9 290x
 aliases = [ "eple.tail9aac63.ts.net" ]
+buildMachine.systems = ["x86_64-linux", "i686-linux", "aarch64-linux"]
 buildMachine.maxJobs = 3 # 12 threads 32GB
 buildMachine.speedFactor = 3 # i7-5820K
 buildMachine.supportedFeatures = ["kvm", "big-parallel", "nixos-test"]