thanks raf :3 (https://github.com/NotAShelf)

flake.nix

@@ -1,39 +1,25 @@
 {
-  description = "A very basic flake";
+  description = "Jacekpoz's Nixos Configurations";
+
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  } @ inputs: let
+    inherit (nixpkgs) lib; # we isolate lib from nixpkgs to be able to pass it to specific flake options, alternatively use nixpkgs.lib
+  in {
+    # instead of cluttering flake.nix, import all nixosConfigurations from their own dedicated file
+    nixosConfigurations = import ./hosts {inherit nixpkgs inputs lib;};
+  };
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
     hyprland.url = "github:hyprwm/Hyprland";
+
     home-manager = {
       url = "github:nix-community/home-manager";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
-
-  outputs = inputs@{ self, nixpkgs, hyprland, home-manager, ... }: {
-    nixosConfigurations.niksos = nixpkgs.lib.nixosSystem {
-      system = "x86_64-linux";
-      modules = [
-        ./configuration.nix
-	home-manager.nixosModules.home-manager
-        hyprland.nixosModules.default
-	{ 
-	  home-manager.useGlobalPkgs = true;
-	  #home-manager.users.jacek = import ./home.nix;
-	  programs.hyprland = {
-            enable = true;
-            xwayland = {
-              enable = true;
-	      hidpi = true;
-	    };
-	    nvidiaPatches = false;
-	  }; 
-	}
-      ];
-    };
-
-    packages.x86_64-linux.hello = nixpkgs.legacyPackages.x86_64-linux.hello;
-
-    packages.x86_64-linux.default = self.packages.x86_64-linux.hello;
-  };
 }

homes/default.nix

@@ -0,0 +1,14 @@
+{
+  inputs,
+  self,
+  ...
+}: {
+  home-manager = {
+    useUserPackages = true;
+    useGlobalPkgs = true;
+    extraSpecialArgs = {inherit inputs self;}; # let home-manager access inputs and self
+    users = {
+      jacek = import ./jacek; # if more users to be added, create a directory for each one of them with a file called default.nix in them
+    };
+  };
+}

homes/jacek/default.nix

@@ -0,0 +1,27 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: {
+  # your home-manager configuration goes in this file
+  programs = {
+    zsh.enable = true; # enable zsh on home-manager's end
+    home-manager.enable = true; # let home-manager enable itself
+  };
+
+  home = {
+    username = "jacek";
+    homeDirectory = "/home/jacek";
+    packages = with pkgs; [
+      neofetch
+      tree
+      git
+      librewolf-wayland
+      foot
+      keepassxc
+      neovim
+    ];
+    stateVersion = lib.mkDefault "23.11";
+  };
+}

hosts/default.nix

@@ -0,0 +1,26 @@
+{
+  lib,
+  inputs,
+  ...
+}: let
+  self = inputs.self;
+
+  home-manager = inputs.home-manager.nixosModules.home-manager;
+  home-configs = import ../homes;
+in {
+  niksos = lib.nixosSystem {
+    system = "x86_64-linux";
+    specialArgs = {inherit lib inputs self;};
+    modules =
+      [
+        {networking.hostName = "niksos";}
+        ./niksos
+      ]
+      ++ [
+        # this concatenates to lists
+        # this list includes an alias for the home-manager module, and another for the global home-manager configuration directory
+        home-manager
+        home-configs
+      ];
+  };
+}

hosts/niksos/configuration.nix

@@ -1,10 +1,12 @@
-{ config, pkgs, ... }:
-
 {
-  imports =
-    [
-      ./hardware-configuration.nix
-    ];
+  config,
+  pkgs,
+  inputs,
+  ...
+}: {
+  imports = [
+    inputs.hyprland.nixosModules.default
+  ];
 
   nixpkgs.config.allowUnfree = true;
 
@@ -12,7 +14,6 @@
   boot.loader.grub.enable = true;
   boot.loader.grub.device = "/dev/sda";
 
-  networking.hostName = "niksos";
   networking.networkmanager.enable = true;
 
   time.timeZone = "Europe/Warsaw";
@@ -20,18 +21,14 @@
   # Enable the X11 windowing system.
   # services.xserver.enable = true;
 
-
   nix.settings = {
     experimental-features = [
       "flakes"
       "nix-command"
-      "recursive-nix"
-      "ca-derivations"
     ];
-    substituters = [ "https://hyprland.cachix.org" ];
-    trusted-public-keys = [ "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc=" ];
+    substituters = ["https://hyprland.cachix.org"];
+    trusted-public-keys = ["hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="];
   };
-  
 
   # Enable sound.
   # sound.enable = true;
@@ -42,30 +39,22 @@
 
   programs.zsh.enable = true;
 
+  programs.hyprland = {
+    enable = true;
+    xwayland = {
+      enable = true;
+      hidpi = true;
+    };
+    nvidiaPatches = false;
+  };
+
   users.users.jacek = {
     isNormalUser = true;
-    extraGroups = [ "wheel" "networkmanager" ];
+    extraGroups = ["wheel" "networkmanager"];
     shell = pkgs.zsh;
   };
 
-  home-manager.users.jacek = { pkgs, ... }: {
-    home = {
-      packages = with pkgs; [
-        neofetch
-        tree
-        git
-        librewolf-wayland
-        foot
-        keepassxc
-        neovim
-	home-manager
-      ];
-      stateVersion = "23.11";
-    };
-    programs.zsh.enable = true;
-  };
-
-  environment.shells = with pkgs; [ zsh ];
+  environment.shells = with pkgs; [zsh];
 
   #environment.systemPackages = with pkgs; [
   #  neovim
@@ -79,4 +68,3 @@
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.stateVersion = "23.11"; # Did you read the comment?
 }
-

hosts/niksos/default.nix

@@ -0,0 +1,6 @@
+_: {
+  imports = [
+    ./configuration.nix
+    ./hardware-configuration.nix
+  ];
+}