Cargo.toml

[package]
name = "test"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
ethers = "1.0.2"

flake.nix

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/release-22.11";
    devenv.url = "github:cachix/devenv";
    flake-utils.url = "github:numtide/flake-utils";
    fenix = {
      url = "github:nix-community/fenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, flake-utils, fenix, devenv }@inputs:
    flake-utils.lib.eachDefaultSystem (system:
      let pkgs = import nixpkgs { inherit system; overlays = [ fenix.overlays.default ]; };
      in {
        devShell = devenv.lib.mkShell {
          inherit inputs pkgs;
          modules = with pkgs; [
            {
              packages = [
                pkg-config
                openssl
                darwin.apple_sdk.frameworks.Security
              ];
              
              # attempted to fix with this, doesn't work
              # env.LD_LIBRARY_PATH = "${pkgs.lib.makeLibraryPath ([pkg-config openssl darwin.apple_sdk.frameworks.Security])}";

              languages.rust = {
                enable = true;
                version = "stable";
              };
            }
          ];
        };
      }
    );
}

main.rs

// should be put to src/main.rs
fn main() {}