pkgs/conduit: remove dependency on fenix and crane

pkgs/conduit/default.nix

@@ -1,10 +1,6 @@
 {
   lib,
   stdenv,
-  pkgs,
-  system,
-  fenix,
-  crane,
   src,
   libiconv,
   rocksdb,
@@ -12,27 +8,18 @@
   rustPlatform,
 }:
 let
-  rust =
-    with fenix.${system};
-    combine [
-      stable.cargo
-      stable.rustc
-    ];
-  crane' = (crane pkgs).overrideToolchain rust;
-  rocksdb' = rocksdb.overrideAttrs (
-    final: prev: {
-      version = "9.1.1";
-      src = prev.src.override {
-        rev = "v${final.version}";
-        hash = "sha256-/Xf0bzNJPclH9IP80QNaABfhj4IAR5LycYET18VFCXc=";
-      };
-    }
-  );
+  manifest = (builtins.fromTOML (builtins.readFile "${src}/Cargo.toml")).package;
 in
-crane'.buildPackage {
+rustPlatform.buildRustPackage {
+  pname = manifest.name;
+  inherit (manifest) version;
+
   inherit src;
   strictDeps = true;
 
+  useFetchCargoVendor = true;
+  cargoHash = "sha256-wESDxtKRMm/jyCr4kc20UuHGcE2s+OCMjfL+l1XihnA=";
+
   nativeBuildInputs = [ rustPlatform.bindgenHook ];
 
   buildInputs = lib.optionals stdenv.isDarwin [
@@ -42,8 +29,8 @@ crane'.buildPackage {
   ];
 
   # Use system RocksDB
-  ROCKSDB_INCLUDE_DIR = "${rocksdb'}/include";
-  ROCKSDB_LIB_DIR = "${rocksdb'}/lib";
+  ROCKSDB_INCLUDE_DIR = "${rocksdb}/include";
+  ROCKSDB_LIB_DIR = "${rocksdb}/lib";
   NIX_OUTPATH_USED_AS_RANDOM_SEED = "randomseed";
   CONDUIT_VERSION_EXTRA = src.shortRev;
 }

pkgs/default.nix

@@ -17,8 +17,6 @@ in
     package = import ./conduit;
     settings.args = {
       src = config.inputs.conduit-src.result;
-      crane = config.inputs.crane.result.mkLib;
-      fenix = config.inputs.fenix.result.packages;
     };
   };