Stylix follows nixpkgs, weekly GC, drop VMs and Flatnotes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

flake.lock

@@ -298,22 +298,6 @@
       }
     },
     "nixpkgs_4": {
-      "locked": {
-        "lastModified": 1785386831,
-        "narHash": "sha256-sPS3CaXH8RAT3FZRuy4VcV47iuYIWMMfa0GbyJKC3o4=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "21ea275a7c46aef9d4d6ddc962e6d562e9d94183",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-26.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_5": {
       "locked": {
         "lastModified": 1789286504,
         "narHash": "sha256-eiEK7cKZORNEvX0GeF3RtNEF/JXhgf2RqSp3230q13E=",
@@ -409,7 +393,9 @@
         "firefox-gnome-theme": "firefox-gnome-theme",
         "flake-parts": "flake-parts_2",
         "gnome-shell": "gnome-shell",
-        "nixpkgs": "nixpkgs_4",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
         "nur": "nur",
         "systems": "systems",
         "tinted-kitty": "tinted-kitty",
@@ -516,7 +502,7 @@
         "home-manager": [
           "home-manager"
         ],
-        "nixpkgs": "nixpkgs_5"
+        "nixpkgs": "nixpkgs_4"
       },
       "locked": {
         "lastModified": 1789702344,