Started work on refactoring nix config codebase

.config/nix/flake.lock

@@ -139,25 +139,38 @@
     },
     "home-manager": {
       "inputs": {
-        "nixpkgs": [
+        "nixpkgs": "nixpkgs"
-          "nixpkgs"
-        ]
       },
       "locked": {
-        "lastModified": 1756683562,
+        "lastModified": 1757256385,
-        "narHash": "sha256-3fcIqwm1u+rF3kkgUYYEIcLrs93+Pi+a6AwiEAxdP5g=",
+        "narHash": "sha256-WK7tOhWwr15mipcckhDg2no/eSpM1nIh4C9le8HgHhk=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "fccb44df77266a3891939f35197f538dace3442f",
+        "rev": "f35703b412c67b48e97beb6e27a6ab96a084cd37",
         "type": "github"
       },
       "original": {
-        "owner": "nix-community",
+        "id": "home-manager",
-        "repo": "home-manager",
+        "type": "indirect"
-        "type": "github"
       }
     },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1757068644,
+        "narHash": "sha256-NOrUtIhTkIIumj1E/Rsv1J37Yi3xGStISEo8tZm3KW4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8eb28adfa3dc4de28e792e3bf49fcf9007ca8ac9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1756542300,
         "narHash": "sha256-tlOn88coG5fzdyqz6R93SQL5Gpq+m/DsWpekNFhqPQk=",
@@ -201,7 +214,7 @@
     "root": {
       "inputs": {
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs",
+        "nixpkgs": "nixpkgs_2",
         "stylix": "stylix"
       }
     },

.config/nix/hosts/common.nix

@@ -0,0 +1,26 @@
+{ config, pkgs, inputs, ... }
+
+{
+  # Enable automatic system updates
+  system.autoUpgrade = {
+    enable = true;
+    flake = inputs.self.outPath;
+    flags = [
+      "--update-input"
+      "nixpkgs"
+      "-L" # print build logs
+    ];
+    dates = "weekly";
+    randomizedDelaySec = "45min";
+  };
+  # Automate Nix garbage collection
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 7d";
+  };
+  # Allow non-free software (RMS will be mad at me :<)
+  nixpkgs.config.allowUnfree = true;
+  # Enable nix-command and flakes
+  nix.settings.experimental-features = [ "nix-command" "flakes"];
+}

.config/nix/hosts/syntheticnexus/configuration.nix

@@ -6,22 +6,6 @@
       ./hardware-configuration.nix
     ]; 
 
-  # Enable automatic system updates
-  system.autoUpgrade = {
-    enable = true;
-    flake = inputs.self.outPath;
-    flags = [
-      "--update-input"
-      "nixpkgs"
-      "-L" # print build logs
-    ];
-    dates = "weekly";
-    randomizedDelaySec = "45min";
-  };
-  # Allow non-free software (RMS will be mad at me :<)
-  nixpkgs.config.allowUnfree = true;
-  # Enable nix-command and flakes
-  nix.settings.experimental-features = [ "nix-command" "flakes"];
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
   systemd.tpm2.enable = false;