uncss: build on 25.11 (broken in unstable)

Flake lock file updates:

• Updated input 'uncss/nixpkgs':
    follows 'nixpkgs'
  → 'github:NixOS/nixpkgs/1766437c5509f444c1b15331e82b8b6a9b967000' (2026-04-15)

1 files changed, 2 insertions, 3 deletions

diff --git a/flake.nix b/flake.nix
index f5fec3f..e556009 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,11 +7,10 @@
     uncss = {
       url = "github:qaristote/uncss";
       inputs = {
-        nixpkgs.follows = "/nixpkgs";
+        nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
       };
     };
-    # nixpkgs = { };
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
+    nixpkgs = { };
   };
 
   outputs =