flake.nix: Make rust-overlay inputs follow ours

flake.lock

@@ -15,21 +15,6 @@
         "type": "github"
       }
     },
-    "flake-utils_2": {
-      "locked": {
-        "lastModified": 1656065134,
-        "narHash": "sha256-oc6E6ByIw3oJaIyc67maaFcnjYOz1mMcOtHxbEf9NwQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "bee6a7250dd1b01844a2de7e02e4df7d8a0a206c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "naersk": {
       "inputs": {
         "nixpkgs": [
@@ -66,22 +51,6 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1656401090,
-        "narHash": "sha256-bUS2nfQsvTQW2z8SK7oEFSElbmoBahOPtbXPm0AL3I4=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "16de63fcc54e88b9a106a603038dd5dd2feb21eb",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
@@ -92,8 +61,12 @@
     },
     "rust-overlay": {
       "inputs": {
-        "flake-utils": "flake-utils_2",
-        "nixpkgs": "nixpkgs_2"
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
         "lastModified": 1657939629,

flake.nix

@@ -5,6 +5,8 @@
     flake-utils.url = "github:numtide/flake-utils";
 
     rust-overlay.url = "github:oxalica/rust-overlay";
+    rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
+    rust-overlay.inputs.flake-utils.follows = "flake-utils";
 
     naersk.url = "github:nmattia/naersk";
     naersk.inputs.nixpkgs.follows = "nixpkgs";