Refactor code and reorganize files

flake.nix

@@ -27,7 +27,7 @@ Prefer `nix <commmand>` command rather than `nix-<something>` commmands if flake
     };
 
     niri = {
-      url = github:YaLTeR/niri;
+      url = "github:YaLTeR/niri";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };

modules/environment/programs/default.nix

@@ -1,18 +1,11 @@
-{pkgs, ...}: {
+{...}: {
+  imports = [
+    ./steam.nix
+  ];
+
   programs = {
     dconf.enable = true;
 
-    fish = {
-      enable = true;
-      useBabelfish = true;
-
-      vendor = {
-        config.enable = true;
-        completions.enable = true;
-        functions.enable = true;
-      };
-    };
-
     # INFO: https://nixos.wiki/wiki/Git
     git = {
       enable = true;

modules/environment/programs/steam.nix

@@ -0,0 +1,21 @@
+{pkgs, ...}: {
+  programs = {
+    steam = {
+      enable = true;
+      # Start a Steam game in an optimized microcompositor that might fix some issues
+      gamescopeSession.enable = true;
+    };
+
+    # INFO: It applies temporary optimizations applies to the OS in-game, improving performance
+    gamemode.enable = true;
+  };
+
+  /*
+  NOTE:
+  Prepend `mangohud` in launch options within Steam client's General settings as `mangohud %command%`
+  to access its capabilities in-game. Same goes for other such programs.
+  */
+  environment.systemPackages = with pkgs; [
+    mangohud
+  ];
+}

modules/environment/services/default.nix

@@ -5,6 +5,12 @@ _: {
     udisks2.enable = true;
     devmon.enable = true;
 
+    # Set up Power management for the battery-powered
+    power-profiles-daemon = {
+      enable = true;
+    };
+    upower.enable = true;
+
     # INFO: Necessary for GnuPG to work correctly
     pcscd.enable = true;
   };

modules/environment/users/foo/home-depot/programs/nushell.nix

@@ -1,4 +1,4 @@
-{...}: {
+_: {
   programs = {
     nushell = {
       enable = true;