woot, got it building, on to the next step

flake.lock

@@ -478,6 +478,27 @@
         "type": "github"
       }
     },
+    "jovian": {
+      "inputs": {
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1749627191,
+        "narHash": "sha256-bUv8CDE6Uyxak4UkOvRjx5xj6+msEHSpYGeAjkuTnTs=",
+        "owner": "Jovian-Experiments",
+        "repo": "Jovian-NixOS",
+        "rev": "f31df4cb6b2eeef6cf0113edb687297be72a69df",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Jovian-Experiments",
+        "repo": "Jovian-NixOS",
+        "type": "github"
+      }
+    },
     "lib-aggregate": {
       "inputs": {
         "flake-utils": "flake-utils",
@@ -533,6 +554,28 @@
         "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-minecraft": {
       "inputs": {
         "flake-compat": "flake-compat_3",
@@ -822,6 +865,7 @@
         "flux": "flux",
         "himmelblau": "himmelblau",
         "home-manager": "home-manager",
+        "jovian": "jovian",
         "nix-minecraft": "nix-minecraft",
         "nixos-boot": "nixos-boot",
         "nixpkgs": "nixpkgs_5",

flake.nix

@@ -45,7 +45,7 @@
 
     jovian = {
       url = "github:Jovian-Experiments/Jovian-NixOS";
-      inputs.nixpkgs.follows = "nixpkgs-unstable";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 

hosts/tulkas/default.nix

@@ -3,7 +3,7 @@
   modules = {
     system.audio.enable = true;
 
-    gaming.enable = true;
+    desktop.gaming.enable = true;
 
     root = {
       user = {

hosts/tulkas/users/chris/default.nix

@@ -13,15 +13,6 @@
   };
 
   desktop = {
-    plasma = {
-      enable = true;
-      autoLogin = true;
-    };
-
-    applications = {
-      steam.enable = true;
-    };
-
     terminal = {
       default = "ghostty";
       ghostty.enable = true;

lib/nixos.nix

@@ -42,7 +42,7 @@ in rec
         })
         (filterAttrs (n: v: !elem n ["system"]) attrs)
         (import path)
-        (args@{ ... }: {
+        (args@{ inputs, lib, pkgs, config, options, ... }: {
           imports = mapModulesRec' ../modules/home (file: (import file (args // { user = "root"; })));
         })
         ({...}: {
@@ -61,7 +61,7 @@ in rec
           };
         })
       ]
-      ++ (map (user: (args@{ ... }: {
+      ++ (map (user: (args@{ inputs, lib, pkgs, config, options, ... }: {
         imports = mapModulesRec' ../modules/home (file: (import file (args // { inherit user; })));
 
         config.modules.${user} = (import "${path}/users/${user}/default.nix" args);

modules/home/desktop/applications/steam.nix

@@ -1,14 +1,12 @@
-{ options, config, lib, pkgs, user, ... }:
+{ config, lib, pkgs, user, ... }:
 let
-  inherit (lib.modules) mkIf mkForce mkMerge;
+  inherit (lib) mkEnableOption mkIf mkForce mkMerge;
 
   cfg = config.modules.${user}.desktop.applications.steam;
   desktop = config.modules.${user}.desktop;
 in
 {
-  options.modules.${user}.desktop.applications.steam = let
-    inherit (lib.options) mkEnableOption;
-  in {
+  options.modules.${user}.desktop.applications.steam = {
     enable = mkEnableOption "Enable steam, the game/software store";
     hardware.enable = mkEnableOption "Support for steam hardware";
   };

modules/home/desktop/default.nix

@@ -1,17 +1,10 @@
-{ config, options, lib, pkgs, user, ... }:
+{ lib, user, ... }:
 let
-  inherit (builtins) isAttrs;
-  inherit (lib.attrsets) attrValues;
-  inherit (lib.modules) mkIf mkMerge;
-  inherit (lib.my) anyAttrs countAttrs value;
-
-  cfg = config.modules.${user}.desktop;
+  inherit (lib.types) either str;
+  inherit (lib.my) mkOpt;
 in
 {
-  options.modules.${user}.desktop = let
-    inherit (lib.types) either str;
-    inherit (lib.my) mkOpt;
-  in {
+  options.modules.${user}.desktop = {
     type = mkOpt (either str null) "wayland";
   };
 }

modules/home/themes/default.nix

@@ -1,6 +1,6 @@
 { config, lib, pkgs, user, ... }:
 let
-  inherit (lib) mkIf;
+  inherit (lib) mkIf mkDefault;
   inherit (lib.options) mkOption mkEnableOption;
   inherit (lib.types) nullOr enum;
 
@@ -31,7 +31,7 @@ in {
       base16Scheme = "${pkgs.base16-schemes}/share/themes/${cfg.theme}.yaml";
       image = ./${cfg.theme}.jpg;
       polarity = cfg.polarity;
-      targets.qt.platform = "kde6";
+      targets.qt.platform = mkDefault "kde6";
     };
   };
 }

modules/system/desktop/gaming.nix

@@ -11,10 +11,15 @@ in
   };
 
   config = mkIf cfg.enable {
-    jovian.steam = {
-      enable = true;
-      autoStart = true;
-
+    jovian = {
+      steam = {
+        enable = true;
+        autoStart = true;
+        user = "chris";
+        updater.splash = "steamos";
+        desktopSession = "gamescope-wayland";
+      };
+      steamos.useSteamOSConfig = true;
     };
   };
 }