flake.nix: replace naersk with buildRustPackage

flake.lock

@@ -1,26 +1,5 @@
 {
   "nodes": {
-    "naersk": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1713520724,
-        "narHash": "sha256-CO8MmVDmqZX2FovL75pu5BvwhW+Vugc7Q6ze7Hj8heI=",
-        "owner": "nix-community",
-        "repo": "naersk",
-        "rev": "c5037590290c6c7dae2e42e7da1e247e54ed2d49",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "ref": "master",
-        "repo": "naersk",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1714656196,
@@ -39,7 +18,6 @@
     },
     "root": {
       "inputs": {
-        "naersk": "naersk",
         "nixpkgs": "nixpkgs",
         "utils": "utils"
       }

flake.nix

@@ -2,27 +2,21 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     utils.url = "github:numtide/flake-utils";
-    naersk = {
-      url = "github:nix-community/naersk/master";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
   };
 
-  outputs = { self, nixpkgs, utils, naersk }:
+  outputs = { self, nixpkgs, utils }:
     let
       inherit (nixpkgs) lib;
       deadnixLambda = pkgs:
-        let
-          naersk-lib = pkgs.callPackage naersk { };
-        in
-        naersk-lib.buildPackage {
+        pkgs.rustPlatform.buildRustPackage {
           pname = "deadnix";
-          root = ./.;
-          checkInputs = [ pkgs.rustPackages.clippy ];
+          version = self.sourceInfo.lastModifiedDate;
+          src = ./.;
+          cargoLock.lockFile = ./Cargo.lock;
+          nativeCheckInputs = [ pkgs.clippy ];
           doCheck = true;
-          cargoTestCommands = x:
-            x ++ [
-              ''cargo clippy --all --all-features --tests -- \
+          postCheck = ''
+            cargo clippy --all --all-features --tests -- \
                 -D clippy::pedantic \
                 -D warnings \
                 -A clippy::module-name-repetitions \
@@ -31,8 +25,8 @@
                 -A clippy::cast-possible-truncation \
                 -A clippy::nonminimal_bool \
                 -A clippy::must-use-candidate \
-                -A clippy::missing-panics-doc || true''
-            ];
+                -A clippy::missing-panics-doc
+          '';
           meta.description = "Scan Nix files for dead code";
         };
     in