Changes for lambda, with tmpfs root

config/hardware/lambda.nix

@@ -23,14 +23,13 @@ in {
       kernelModules = [ ];
     };
 
-    kernelModules = [ "kvm-amd" ];
-    kernelPackages = pkgs.linuxPackages.zfs;
+    kernelModules = [ "kvm-intel" ];
     supportedFilesystems = [ "zfs" ];
 
     loader.grub = {
       enable = true;
       version = 2;
-      device = "/dev/disk/by-label/lambda-root";
+      device = "/dev/disk/by-id/wwn-0x600508b1001cecf6b880f591f9b18b29";
     };
   };
 
@@ -38,11 +37,13 @@ in {
     "/boot" = {
       device = "/dev/disk/by-label/lambda-boot";
       fsType = "ext4";
+      options = [ "noexec" ];
     };
 
     "/" = {
-      device = "lambda/transient/root";
-      fsType = "zfs";
+      device = "none";
+      fsType = "tmpfs";
+      options = [ "noexec" ];
     };
 
     "/nix" = {
@@ -54,29 +55,20 @@ in {
       device = "lambda/transient/logs";
       fsType = "zfs";
       neededForBoot = true;
-    };
-
-    "/home" = {
-      device = "lambda/persistent/home";
-      fsType = "zfs";
+      options = [ "noexec" ];
     };
 
     "/state" = {
       device = "lambda/persistent/state";
       fsType = "zfs";
+      options = [ "noexec" ];
     };
   };
 
-  boot.initrd.postDeviceCommands = lib.mkAfter ''
-    ${pkgs.zfs}/bin/zfs rollback -r lambda/transient/root@blank
-  '';
-
   swapDevices = [{ device = "/dev/disk/by-label/lambda-swap"; }];
 
   nix.maxJobs = lib.mkDefault 12;
 
-  hardware.bluetooth.enable = false;
-
   networking = {
     hostId = substring 0 8 (fileContents /etc/machine-id);