.
├── Cargo.lock
├── Cargo.toml
└── crates
    ├── bdk
    │   └── Cargo.toml
    ├── bitcoind_rpc
    │   └── Cargo.toml
    ├── chain
    │   └── Cargo.toml
    ├── electrum
    │   └── Cargo.toml
    ├── esplora
    │   └── Cargo.toml
    └── file_store
        └── Cargo.toml

  outputs = { self, nixpkgs, nixpkgs-bitcoind, crane, rust-overlay, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        overlays = [ (import rust-overlay) ];
        lib = pkgs.lib;
        pkgs = import nixpkgs {
          inherit system overlays;
        };
        craneLib = crane.lib.${system};
        commonArgs = {
          src = craneLib.cleanCargoSource (craneLib.path ./crates/bdk);
          buildInputs = [
            pkgs-bitcoind.bitcoind
            pkgs.electrs
            pkgs.openssl
          ];
          nativeBuildInputs = [
            pkgs.python3
          ];
        };
        cargoArtifacts = craneLib.buildDepsOnly (commonArgs // {
          pname = "bdk";
        });
        bdkClippy = craneLib.cargoClippy (commonArgs // {
          inherit cargoArtifacts;
          pname = "bdk";
          cargoClippyExtraArgs = "--all-features --all-targets -- -D warnings";
        });
        bdk = craneLib.buildDepsOnly (commonArgs // {
          inherit cargoArtifacts;
          pname = "bdk";
        });
      in
      {
        checks = {
          inherit bdkClippy;
        };
        packages.default = bdk;
        };
      });

warning: Git tree '/Users/einherjar/git/btc/bdk' is dirty
error:
       … while checking flake output 'checks'

         at /nix/store/p58d2j0ac7zvja5jl14xzbc19fakjxh2-source/lib.nix:39:17:

           38|               {
           39|                 ${key} = (attrs.${key} or { })
             |                 ^
           40|                   // { ${system} = ret.${key}; };

       … while checking the derivation 'checks.aarch64-darwin.bdkClippy'

         at /nix/store/7sf8jijcv573vj2sfjzkwc2nq2lpv1xd-source/flake.nix:115:18:

          114|           # Build the crate as part of `nix flake check` for convenience
          115|           inherit bdkClippy;
             |                  ^
          116|

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: unable to find Cargo.lock at /nix/store/6lr0d0kxkbxpcdckn6x824m4aman3w15-source. please ensure one of the following:
       - a Cargo.lock exists at the root of the source directory of the derivation
       - set `cargoVendorDir = vendorCargoDeps { cargoLock = ./some/path/to/Cargo.lock; }`
       - set `cargoVendorDir = vendorCargoDeps { src = ./src/containing/cargo/lock/file; }`
       - set `cargoVendorDir = null` to skip vendoring altogether

 I  ~/g/b/bdk einherjar/nix• 9.2s ❱ nix flake check
warning: Git tree '/Users/einherjar/git/btc/bdk' is dirty
error:
       … while checking flake output 'checks'

         at /nix/store/p58d2j0ac7zvja5jl14xzbc19fakjxh2-source/lib.nix:39:17:

           38|               {
           39|                 ${key} = (attrs.${key} or { })
             |                 ^
           40|                   // { ${system} = ret.${key}; };

       … while checking the derivation 'checks.aarch64-darwin.bdkClippy'

         at /nix/store/7sf8jijcv573vj2sfjzkwc2nq2lpv1xd-source/flake.nix:115:18:

          114|           # Build the crate as part of `nix flake check` for convenience
          115|           inherit bdkClippy;
             |                  ^
          116|

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: unable to find Cargo.lock at /nix/store/6lr0d0kxkbxpcdckn6x824m4aman3w15-source. please ensure one of the following:
       - a Cargo.lock exists at the root of the source directory of the derivation
       - set `cargoVendorDir = vendorCargoDeps { cargoLock = ./some/path/to/Cargo.lock; }`
       - set `cargoVendorDir = vendorCargoDeps { src = ./src/containing/cargo/lock/file; }`
       - set `cargoVendorDir = null` to skip vendoring altogether