flake: update flake

flake.nix

@@ -26,11 +26,6 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
-    nix-gaming = {
-      url = "github:fufexan/nix-gaming";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-
     nixpkgs-xr = {
       url = "github:nix-community/nixpkgs-xr";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -104,8 +99,56 @@
       trusted-users-configuration = { nix, config, ... }: {
         nix.settings.trusted-users = [ config.users.users.frank.name ];
       };
+
+      systems = [
+        "x86_64-linux"
+        "aarch64-darwin"
+      ];
+
+      forAllSystems = nixpkgs.lib.genAttrs systems;
+
+      packagesFor =
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        nixpkgs.lib.optionalAttrs pkgs.stdenv.hostPlatform.isLinux {
+          heidisql = pkgs.callPackage ./packages/heidisql/package.nix { };
+          aseprite-thumbnailer-kde = pkgs.callPackage ./packages/aseprite-thumbnailer-kde/package.nix { };
+        };
+
+      formatterFor =
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        pkgs.writeShellApplication {
+          name = "nixfmt";
+          runtimeInputs = [ pkgs.nixfmt ];
+          text = ''
+            flags=()
+            paths=()
+            for arg in "$@"; do
+              case "$arg" in
+                -*) flags+=("$arg") ;;
+                *) paths+=("$arg") ;;
+              esac
+            done
+            if [ "''${#paths[@]}" -eq 0 ]; then
+              if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+                mapfile -t paths < <(git ls-files '*.nix')
+              else
+                mapfile -t paths < <(find . -name '*.nix' -not -path './.devenv/*')
+              fi
+            fi
+            nixfmt "''${flags[@]}" "''${paths[@]}"
+          '';
+        };
     in
     {
+      packages = forAllSystems packagesFor;
+
+      formatter = forAllSystems formatterFor;
       nixosConfigurations = {
         nero = nixpkgs.lib.nixosSystem {
           specialArgs = { inherit inputs; };