craneUtils: build with rustPlatform (#431)

* This should hopefully result in fewer surprises if someone is using a
  really ancient toolchain for their code since we'll use whatever is in
  nixpkgs to build craneUtils instead

CHANGELOG.md

@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## Unreleased
 
+### Changed
+* `craneUtils` will now be built with the `rustPlatform` provided by nixpkgs
+  instead of the currently configured toolchain. This should hopefully result in
+  fewer surprises for those testing with really old MSRV toolchains.
+
 ## [0.14.2] - 2023-10-15
 
 ### Added

pkgs/crane-utils/default.nix

@@ -1,9 +1,10 @@
 { buildDepsOnly
-, buildPackage
 , cargoClippy
 , cargoFmt
 , cleanCargoSource
+, crateNameFromCargoToml
 , path
+, rustPlatform
 }:
 
 let
@@ -13,8 +14,11 @@ let
     inherit src;
   };
 in
-buildPackage {
-  inherit cargoArtifacts src;
+rustPlatform.buildRustPackage {
+  inherit src;
+  inherit (crateNameFromCargoToml { inherit src; }) pname version;
+
+  cargoSha256 = "sha256-2mqTVhYsOxqD+F5f4yCPvz2jZ2bdAMBK1tgNMyVDtsA=";
 
   passthru = {
     checks = {