fix: nixpkgs for darwin

flake.lock

@@ -1159,22 +1159,6 @@
       }
     },
     "nixpkgs-stable_3": {
-      "locked": {
-        "lastModified": 1717144377,
-        "narHash": "sha256-F/TKWETwB5RaR8owkPPi+SPJh83AQsm6KrQAlJ8v/uA=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "805a384895c696f802a9bf5bf4720f37385df547",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-24.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs-stable_4": {
       "locked": {
         "lastModified": 1710695816,
         "narHash": "sha256-3Eh7fhEID17pv9ZxrPwCLfqXnYP006RKzSs0JptsN84=",
@@ -1503,7 +1487,7 @@
         "nixpkgs": [
           "nixpkgs"
         ],
-        "nixpkgs-stable": "nixpkgs-stable_4"
+        "nixpkgs-stable": "nixpkgs-stable_3"
       },
       "locked": {
         "lastModified": 1716213921,
@@ -1541,7 +1525,6 @@
         "nixos-rk3588": "nixos-rk3588",
         "nixpkgs": "nixpkgs_7",
         "nixpkgs-darwin": "nixpkgs-darwin",
-        "nixpkgs-stable": "nixpkgs-stable_3",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "nuenv": "nuenv",
         "nur-ryan4yin": "nur-ryan4yin",