checks/installation: don't hardcode system

checks/installation/flake-module.nix

@@ -23,7 +23,6 @@
 
         environment.etc."install-successful".text = "ok";
 
-        nixpkgs.hostPlatform = "x86_64-linux";
         boot.consoleLogLevel = lib.mkForce 100;
         boot.kernelParams = [ "boot.shell_on_fail" ];
 
@@ -89,9 +88,9 @@
     let
       dependencies = [
         self
-        self.nixosConfigurations.test-install-machine.config.system.build.toplevel
-        self.nixosConfigurations.test-install-machine.config.system.build.diskoScript
-        self.nixosConfigurations.test-install-machine.config.system.clan.deployment.file
+        self.clanInternals.machines.${pkgs.hostPlatform.system}.test-install-machine.config.system.build.toplevel
+        self.clanInternals.machines.${pkgs.hostPlatform.system}.test-install-machine.config.system.build.diskoScript
+        self.clanInternals.machines.${pkgs.hostPlatform.system}.test-install-machine.config.system.clan.deployment.file
         pkgs.bash.drvPath
         pkgs.stdenv.drvPath
         pkgs.nixos-anywhere
@@ -120,7 +119,7 @@
       # 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.isAarch64) {
+      checks = pkgs.lib.mkIf pkgs.stdenv.isLinux {
         test-installation = (import ../lib/test-base.nix) {
           name = "test-installation";
           nodes.target = {

checks/morph/flake-module.nix

@@ -23,7 +23,7 @@
       ...
     }:
     {
-      checks = pkgs.lib.mkIf (pkgs.stdenv.isLinux && !pkgs.stdenv.isAarch64) {
+      checks = pkgs.lib.mkIf pkgs.stdenv.isLinux {
         test-morph = (import ../lib/test-base.nix) {
           name = "morph";