Add steam deck host

flake.lock

@@ -137,6 +137,27 @@
         "type": "github"
       }
     },
+    "jovian": {
+      "inputs": {
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1770366813,
+        "narHash": "sha256-q6dmMSV2EcA6/EXy2oJXoLgxSGjrKY0bixfYbK4fi/4=",
+        "owner": "Jovian-Experiments",
+        "repo": "Jovian-NixOS",
+        "rev": "2af374cd694b45c7d1773edda154081d0ee81f64",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Jovian-Experiments",
+        "repo": "Jovian-NixOS",
+        "type": "github"
+      }
+    },
     "nix-darwin": {
       "inputs": {
         "nixpkgs": [
@@ -158,6 +179,28 @@
         "type": "github"
       }
     },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "jovian",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1729697500,
+        "narHash": "sha256-VFTWrbzDlZyFHHb1AlKRiD/qqCJIripXKiCSFS8fAOY=",
+        "owner": "zhaofengli",
+        "repo": "nix-github-actions",
+        "rev": "e418aeb728b6aa5ca8c5c71974e7159c2df1d8cf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "zhaofengli",
+        "ref": "matrix-name",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
     "nix-homebrew": {
       "inputs": {
         "brew-src": "brew-src"
@@ -236,6 +279,7 @@
         "disko": "disko",
         "firefox-addons": "firefox-addons",
         "home-manager": "home-manager",
+        "jovian": "jovian",
         "nix-darwin": "nix-darwin",
         "nix-homebrew": "nix-homebrew",
         "nixpkgs": "nixpkgs_2",

flake.nix

@@ -17,9 +17,11 @@
     nix-homebrew.url = "github:zhaofengli/nix-homebrew";
     disko.url = "github:nix-community/disko";
     disko.inputs.nixpkgs.follows = "nixpkgs";
+    jovian.url = "github:Jovian-Experiments/Jovian-NixOS";
+    jovian.inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = inputs@{ self, nix-darwin, nixpkgs, home-manager, nixvim, claude-code, firefox-addons, nix-homebrew, disko }:
+  outputs = inputs@{ self, nix-darwin, nixpkgs, home-manager, nixvim, claude-code, firefox-addons, nix-homebrew, disko, jovian }:
   {
     darwinConfigurations."macbook" = nix-darwin.lib.darwinSystem {
       modules = [
@@ -62,6 +64,16 @@
       ];
     };
 
+    nixosConfigurations."deck" = nixpkgs.lib.nixosSystem {
+      system = "x86_64-linux";
+      modules = [
+        jovian.nixosModules.default
+        disko.nixosModules.disko
+        ./hosts/nixos/deck/system.nix
+        ./hosts/nixos/deck/disk-config.nix
+      ];
+    };
+
     homeConfigurations = {
       "yanlin@macbook" = home-manager.lib.homeManagerConfiguration {
         pkgs = nixpkgs.legacyPackages.aarch64-darwin;
@@ -92,6 +104,12 @@
         modules = [ ./hosts/nixos/nfss/home.nix ];
         extraSpecialArgs = { inherit claude-code nixvim; };
       };
+
+      "yanlin@deck" = home-manager.lib.homeManagerConfiguration {
+        pkgs = nixpkgs.legacyPackages.x86_64-linux;
+        modules = [ ./hosts/nixos/deck/home.nix ];
+        extraSpecialArgs = { inherit claude-code nixvim; };
+      };
     };
   };
 }

hosts/nixos/deck/disk-config.nix

@@ -0,0 +1,34 @@
+{
+  disko.devices = {
+    disk = {
+      main = {
+        type = "disk";
+        device = "/dev/nvme0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "fmask=0077" "dmask=0077" ];
+              };
+            };
+
+            root = {
+              size = "100%";
+              content = {
+                type = "filesystem";
+                format = "ext4";
+                mountpoint = "/";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}

hosts/nixos/deck/hardware-configuration.nix

@@ -0,0 +1,14 @@
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "usbhid" "usb_storage" "sd_mod" "sdhci_pci" ];
+  boot.kernelModules = [ "kvm-amd" ];
+
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/nixos/deck/home.nix

@@ -0,0 +1,7 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    ../home-default.nix
+  ];
+}

hosts/nixos/deck/system.nix

@@ -0,0 +1,44 @@
+{ config, pkgs, lib, ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ../system-default.nix
+  ];
+
+  boot.loader = {
+    systemd-boot.enable = true;
+    systemd-boot.configurationLimit = 10;
+    efi.canTouchEfiVariables = true;
+    timeout = 3;
+  };
+
+  jovian.devices.steamdeck.enable = true;
+
+  jovian.steam = {
+    enable = true;
+    autoStart = true;
+    user = "yanlin";
+  };
+
+  jovian.steamos.useSteamOSConfig = true;
+
+  jovian.hardware.has.amd.gpu = true;
+
+  hardware.enableRedistributableFirmware = true;
+
+  networking = {
+    hostName = "deck";
+    networkmanager.enable = true;
+    firewall.enable = false;
+  };
+
+  users.users.yanlin = {
+    extraGroups = [ "networkmanager" "wheel" "video" "audio" "input" ];
+  };
+
+  environment.systemPackages = with pkgs; [
+    pciutils
+    usbutils
+  ];
+}

modules/ssh.nix

@@ -9,6 +9,7 @@
       
       "*" = {
         addKeysToAgent = "yes";
+        identitiesOnly = true;
       };
 
       "github.com" = {