github.com_the-nix-way_dev-templates/platformio/flake.nix

{
  description = "A Nix-flake-based PlatformIO development environment";

  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1";

  outputs = inputs:
    let
      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
      forEachSupportedSystem = f: inputs.nixpkgs.lib.genAttrs supportedSystems (system: f {
        pkgs = import inputs.nixpkgs { inherit system; };
      });
    in
    {
      devShells = forEachSupportedSystem ({ pkgs }: {
        default = pkgs.mkShell {
          packages = with pkgs;
            [
              clang-tools
              cmake
              codespell
              conan
              cppcheck
              doxygen
              gtest
              lcov
              platformio
              vcpkg
              vcpkg-tool
            ]
            ++ pkgs.lib.optionals (system != "aarch64-darwin") [ gdb ];

          shellHook = ''
            export PLATFORMIO_CORE_DIR=$PWD/.platformio
          '';
        };
      });
    };
}