{
  description = "Pinchflat fork with JSON REST API for MCP integration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs =
    { self, nixpkgs, ... }:
    let
      supportedSystems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];
      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
    in
    {
      overlays = {
        default = final: prev: {
          pinchflat = prev.pinchflat.overrideAttrs (
            old: {
              # Use the flake's own source — rev and hash are tracked
              # by flake.lock in the consuming repo, no manual updates needed
              src = self.outPath;

              # Deps hashes are identical to upstream — mix.lock and yarn.lock
              # are unchanged in this fork. If they drift, nix build will
              # print the correct hash to use.
              mixFodDeps = old.mixFodDeps.overrideAttrs (_: {
                hash = "sha256-7zLlOzBJcvookYX/4SNC0O1Yr62LIKH9R8rONl3diSs=";
              });

              yarnOfflineCache = old.yarnOfflineCache.overrideAttrs (_: {
                sha256 = "sha256-xJL+qcohtu+OmZ31E1QU9uqBWAFGejKIO3XRd+R6z/4=";
              });
            }
          );
        };
      };

      packages = forAllSystems (
        system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [ self.overlays.default ];
          };
        in
        {
          default = pkgs.pinchflat;
          pinchflat = pkgs.pinchflat;
        }
      );
    };
}