toml2nix: switch to rustPlatform.buildRustPackage

pkgs/development/tools/toml2nix/Cargo.lock

···
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "serde"
+version = "1.0.145"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "728eb6351430bccb993660dfffc5a72f91ccc1295abaa8ce19b27ebe4f75568b"
+
+[[package]]
+name = "toml"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "758664fc71a3a69038656bee8b6be6477d2a6c315a6b81f7081f591bffa4111f"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml2nix"
+version = "0.1.1"
+dependencies = [
+ "toml",
+]

pkgs/development/tools/toml2nix/default.nix

···
+{ lib, rustPlatform, fetchCrate }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "toml2nix";
+  version = "0.1.1";
+
+  src = fetchCrate {
+    inherit pname version;
+    sha256 = "sha256-YhluLS4tFMibFrDzgIvNtfjM5dAqJQvygeZocKn3+Jg=";
+  };
+
+  cargoLock.lockFile = ./Cargo.lock;
+
+  postPatch = ''
+    ln -s ${./Cargo.lock} Cargo.lock
+  '';
+
+  meta = with lib; {
+    description = "A tool to convert TOML files to Nix expressions";
+    homepage = "https://crates.io/crates/toml2nix";
+    license = with licenses; [ mit /* or */ asl20 ];
+    maintainers = with maintainers; [ figsoda ];
+  };
+}

pkgs/tools/toml2nix/default.nix

···
-# Generated by carnix 0.9.7: carnix generate-nix
-{ lib, buildPlatform, buildRustCrate, buildRustCrateHelpers, cratesIO, fetchgit }:
-with buildRustCrateHelpers;
-let inherit (lib.lists) fold;
-    inherit (lib.attrsets) recursiveUpdate;
-in
-let crates = cratesIO; in
-rec {
-  toml2nix = crates.crates.toml2nix."0.1.1" deps;
-  __all = [ (toml2nix {}) ];
-  deps.serde."1.0.84" = {};
-  deps.toml."0.4.10" = {
-    serde = "1.0.84";
-  };
-  deps.toml2nix."0.1.1" = {
-    toml = "0.4.10";
-  };
-}

pkgs/top-level/all-packages.nix

···
 
   toml2json = callPackage ../development/tools/toml2json { };
 
-  toml2nix = (callPackage ../tools/toml2nix { }).toml2nix { };
+  toml2nix = callPackage ../development/tools/toml2nix { };
 
   topgrade = callPackage ../tools/misc/topgrade {
     inherit (darwin.apple_sdk.frameworks) Cocoa Foundation;