Fix impermanence vm

systems/persist/common.nix

@@ -0,0 +1,19 @@
+{ impermanence, ... }:
+
+{
+    imports = [
+        impermanence.nixosModules.impermanence
+    ];
+
+    environment.persistence."/nix/persist/common" = {
+        directories = [
+            "/etc/ssh"
+            "/var/lib"
+        ];
+
+        files = [
+            "/etc/machine-id"
+            "/etc/shadow"
+        ];
+    };
+}

systems/persist/qemu-vm.nix

@@ -0,0 +1,7 @@
+{ ... }:
+
+{
+    imports = [
+        ./common.nix
+    ];
+}