update lock

flake.lock

@@ -123,12 +123,47 @@
         "type": "github"
       }
     },
+    "nixpkgs_4": {
+      "locked": {
+        "lastModified": 1771207753,
+        "narHash": "sha256-b9uG8yN50DRQ6A7JdZBfzq718ryYrlmGgqkRm9OOwCE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d1c15b7d5806069da59e819999d70e1cec0760bf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "ctp": "ctp",
         "gl": "gl",
         "hm": "hm",
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": "nixpkgs_3",
+        "sops": "sops"
+      }
+    },
+    "sops": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_4"
+      },
+      "locked": {
+        "lastModified": 1772048434,
+        "narHash": "sha256-/wA0OaH6kZ/pFA+nXR/tvg5oupOmEDmMS5us79JT60o=",
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "rev": "334daa7c273dd8bf7a0cd370e4e16022b64e55e9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "type": "github"
       }
     },
     "systems": {