Rust Devshell

.envrc

if ! has nix_direnv_version || ! nix_direnv_version 2.3.0; then
    source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.3.0/direnvrc" "sha256-Dmd+j63L84wuzgyjITIfSxSD57Tx7v51DMxVZOsiUD8="
fi
use flake

flake.nix

{
  description = "A Nix-flake-based Rust development environment";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    rust-overlay.url = "github:oxalica/rust-overlay";
    flake-utils.url = "github:numtide/flake-utils";
    devshell.url = "github:numtide/devshell";
  };

  outputs =
    { self
    , nixpkgs
    , rust-overlay
    , flake-utils
    , devshell
    , npmlock2nix
    ,
    }:
    flake-utils.lib.eachDefaultSystem
      (system:
      let
        overlays = [
          rust-overlay.overlays.default
          devshell.overlays.default
          (final: prev: {
            customRustToolchain = prev.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
          })
        ];
        pkgs = import nixpkgs {
          inherit system overlays;
        };
        # add library dev deps here #########################################
        buildInputs = with pkgs; [
          harfbuzz
          openssl
          pango
          sqlite
          mariadb
          zlib
          clang
          libclang
          gzip
          coreutils
          glib
          glibc
        ];
      in
      {
        apps.devshell = self.outputs.devShells.${system}.default.flakeApp;
        devShells.default = pkgs.mkShell {
          packages = with pkgs; # add binary devtools here ##################
            [
              customRustToolchain
              binaryen
              cacert
              cargo-bloat
              cargo-docset
              cargo-machete
              cargo-limit
              cargo-deny
              cargo-edit
              cargo-watch
              cargo-make
              cargo-udeps
              cargo-outdated
              cargo-release
              pkg-config
              unzip
            ]
            ++ buildInputs;
          buildInputs = buildInputs;
          shellHook = ''
            export MALLOC_CONF=thp:always,metadata_thp:always
          '';
        };
      });
}

rust-toolchain.toml

[toolchain]
channel = "nightly-2024-08-20"
targets = [
  "x86_64-unknown-linux-gnu",
  "wasm32-unknown-unknown",    # you might not need this
  "x86_64-pc-windows-msvc",    # 
]
components = [
  "cargo",
  "rustfmt",
  "rust-analyzer",
  "rust-src",
  "rustc-codegen-cranelift",
  "rustc-dev",
]
profile = "default"