diff --git a/checks/backups/flake-module.nix b/checks/backups/flake-module.nix
index 2707b5322..9220163d5 100644
--- a/checks/backups/flake-module.nix
+++ b/checks/backups/flake-module.nix
@@ -135,7 +135,10 @@
   perSystem =
     { pkgs, ... }:
     {
-      checks = pkgs.lib.mkIf (pkgs.stdenv.isLinux) {
+      # Needs investigation on aarch64-linux
+      # vm-test-run-test-backups> qemu-kvm: No machine specified, and there is no default
+      # vm-test-run-test-backups> Use -machine help to list supported machines
+      checks = pkgs.lib.mkIf (pkgs.stdenv.isLinux && pkgs.stdenv.hostPlatform.system != "aarch64-linux") {
         test-backups = (import ../lib/test-base.nix) {
           name = "test-backups";
           nodes.machine = {
diff --git a/checks/installation/flake-module.nix b/checks/installation/flake-module.nix
index d23abb541..ce0dbacb0 100644
--- a/checks/installation/flake-module.nix
+++ b/checks/installation/flake-module.nix
@@ -50,7 +50,16 @@
       qemu-common = import "${inputs.nixpkgs}/nixos/lib/qemu-common.nix" { inherit lib pkgs; };
     in
     {
-      checks = pkgs.lib.mkIf (pkgs.stdenv.isLinux) {
+      # On aarch64-linux, hangs on reboot with after installation:
+      # vm-test-run-test-installation> (finished: waiting for the VM to power off, in 1.97 seconds)
+      # vm-test-run-test-installation>
+      # vm-test-run-test-installation> new_machine: must succeed: cat /etc/install-successful
+      # vm-test-run-test-installation> new_machine: waiting for the VM to finish booting
+      # vm-test-run-test-installation> new_machine: starting vm
+      # vm-test-run-test-installation> new_machine: QEMU running (pid 80)
+      # vm-test-run-test-installation> new_machine: Guest root shell did not produce any data yet...
+      # vm-test-run-test-installation> new_machine:   To debug, enter the VM and run 'systemctl status backdoor.service'.
+      checks = pkgs.lib.mkIf (pkgs.stdenv.isLinux && pkgs.stdenv.hostPlatform.system != "aarch64-linux") {
         test-installation = (import ../lib/test-base.nix) {
           name = "test-installation";
           nodes.target = {
diff --git a/nixosModules/clanCore/outputs.nix b/nixosModules/clanCore/outputs.nix
index d38a7a094..ba517b9a6 100644
--- a/nixosModules/clanCore/outputs.nix
+++ b/nixosModules/clanCore/outputs.nix
@@ -61,12 +61,6 @@
             json metadata about the vm
           '';
         };
-        iso = lib.mkOption {
-          type = lib.types.path;
-          description = ''
-            A generated iso of the machine for the flash command
-          '';
-        };
       };
     };
     description = ''