impermanence

disk-config.nix

@@ -15,17 +15,29 @@
                 mountpoint = "/boot";
               };
             };
-            root = {
+            persistent = {
               size = "100%";
               content = {
                 type = "filesystem";
                 format = "f2fs";
-                mountpoint = "/";
+                mountpoint = "/persistent";
               };
             };
           };
         };
       };
     };
+    nodev = {
+      "/" = {
+        fsType = "tmpfs";
+        mountOptions = [
+          "defaults"
+          "size=2G"
+          "mode=755"
+        ];
+      };
+    };
   };
+
+  fileSystems."/persistent".neededForBoot = true;
 }