remove impermanence nixpkgs follows

nixos/flake.lock

@@ -80,6 +80,21 @@
         "type": "github"
       }
     },
+    "impermanence": {
+      "locked": {
+        "lastModified": 1737831083,
+        "narHash": "sha256-LJggUHbpyeDvNagTUrdhe/pRVp4pnS6wVKALS782gRI=",
+        "owner": "nix-community",
+        "repo": "impermanence",
+        "rev": "4b3e914cdf97a5b536a889e939fb2fd2b043a170",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "impermanence",
+        "type": "github"
+      }
+    },
     "ixx": {
       "inputs": {
         "flake-utils": [
@@ -219,6 +234,7 @@
       "inputs": {
         "disko": "disko",
         "home-manager": "home-manager",
+        "impermanence": "impermanence",
         "nixpkgs": "nixpkgs",
         "nixvim": "nixvim",
         "quasiSecrets": "quasiSecrets",

nixos/flake.nix

@@ -17,10 +17,7 @@
       url = "github:Mic92/sops-nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    impermanence = {
-      url = "github:nix-community/impermanence";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    impermanence.url = "github:nix-community/impermanence";
     # This is a path to the services I've declared. 
     # It just happens to be stored in the same repository (relative), 
     # but could well be a separate repository