bootstrap and system config improvements

flake.lock

@@ -1,5 +1,23 @@
 {
   "nodes": {
+    "claude-code": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1770491177,
+        "narHash": "sha256-4fB6bJg5p5jb9k/vR3KrObVquBMRVfPa1wEY/pz17nQ=",
+        "owner": "ryoppippi",
+        "repo": "claude-code-overlay",
+        "rev": "be6e534fc6d9737d558f8ba41190513391fef01b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ryoppippi",
+        "repo": "claude-code-overlay",
+        "type": "github"
+      }
+    },
     "flake-parts": {
       "inputs": {
         "nixpkgs-lib": [
@@ -82,7 +100,7 @@
       "inputs": {
         "flake-parts": "flake-parts",
         "neovim-src": "neovim-src",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs_2"
       },
       "locked": {
         "lastModified": 1770509107,
@@ -130,6 +148,22 @@
       }
     },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1768127708,
+        "narHash": "sha256-1Sm77VfZh3mU0F5OqKABNLWxOuDeHIlcFjsXeeiPazs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ffbc9f8cbaacfb331b6017d5a5abb21a492c9a38",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1770380644,
         "narHash": "sha256-P7dWMHRUWG5m4G+06jDyThXO7kwSk46C1kgjEWcybkE=",
@@ -145,7 +179,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
+    "nixpkgs_3": {
       "locked": {
         "lastModified": 1770380644,
         "narHash": "sha256-P7dWMHRUWG5m4G+06jDyThXO7kwSk46C1kgjEWcybkE=",
@@ -161,7 +195,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_3": {
+    "nixpkgs_4": {
       "locked": {
         "lastModified": 1769461804,
         "narHash": "sha256-msG8SU5WsBUfVVa/9RPLaymvi5bI8edTavbIq3vRlhI=",
@@ -179,18 +213,19 @@
     },
     "root": {
       "inputs": {
+        "claude-code": "claude-code",
         "fonts": "fonts",
         "home-manager": "home-manager",
         "neovim-nightly": "neovim-nightly",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs_3",
         "zen-browser": "zen-browser"
       }
     },
     "zen-browser": {
       "inputs": {
         "home-manager": "home-manager_2",
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": "nixpkgs_4"
       },
       "locked": {
         "lastModified": 1770480420,