add flatpak support - closes #2

flake.lock

@@ -319,6 +319,21 @@
         "type": "github"
       }
     },
+    "nix-flatpak": {
+      "locked": {
+        "lastModified": 1732304879,
+        "narHash": "sha256-/DOW8VadE//HA6tuV2++NowYWi7Wa/FmJHXRJoTQnfQ=",
+        "owner": "gmodena",
+        "repo": "nix-flatpak",
+        "rev": "c84579946c03c996916be0fb6e1340f444c277af",
+        "type": "github"
+      },
+      "original": {
+        "owner": "gmodena",
+        "repo": "nix-flatpak",
+        "type": "github"
+      }
+    },
     "nix-pre-commit": {
       "inputs": {
         "flake-utils": "flake-utils",
@@ -505,6 +520,7 @@
         "catppuccin-vsc": "catppuccin-vsc",
         "compose2nix": "compose2nix",
         "home-manager": "home-manager",
+        "nix-flatpak": "nix-flatpak",
         "nix-vscode-extensions": "nix-vscode-extensions",
         "nixpkgs": "nixpkgs_3",
         "nixvim": "nixvim",

flake.nix

@@ -6,6 +6,7 @@
       url = "github:nix-community/home-manager/master";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    nix-flatpak.url = "github:gmodena/nix-flatpak";
     nixvim = {
       url = "github:nix-community/nixvim";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -44,6 +45,7 @@
             ./nixos/configuration.nix
             ./nixos/development.nix
             ./nixos/environment.nix
+            ./nixos/flatpak.nix
             ./nixos/gaming.nix
             ./nixos/git.nix
             ./nixos/gui-pkgs.nix
@@ -60,6 +62,7 @@
             }
 
             inputs.nixvim.nixosModules.nixvim
+            inputs.nix-flatpak.nixosModules.nix-flatpak
 
             # Catppuccin theme
             inputs.catppuccin.nixosModules.catppuccin

nixos/flatpak.nix

@@ -0,0 +1,8 @@
+{
+    services.flatpak = {
+        enable = true;
+        packages = [
+            { flatpakref = "https://sober.vinegarhq.org/sober.flatpakref"; sha256 = "1pj8y1xhiwgbnhrr3yr3ybpfis9slrl73i0b1lc9q89vhip6ym2l"; }
+        ];
+    };
+}