flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    # Rust
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs = {
        nixpkgs.follows = "nixpkgs";
        flake-utils.follows = "flake-utils";
      };
    };
  };

  outputs = { self, nixpkgs, rust-overlay, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        overlays = [ (import rust-overlay) ];
        pkgs = import nixpkgs {
          inherit system overlays;
        };
        toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
        stdenv = if pkgs.stdenv.isLinux then pkgs.stdenvAdapters.useMoldLinker pkgs.stdenv else pkgs.stdenv;
      in
      {
        devShells.default = pkgs.mkShell.override { inherit stdenv; } {
          buildInputs = [
            pkgs.rust-analyzer-unwrapped
            toolchain
          ];
          RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";
        };
      });
}