{
  description = "Shared nixpkgs pins for the server fleet";

  inputs = {
    # Default pin — all servers follow this unless overridden below
    nixpkgs.url = "github:NixOS/nixpkgs/1c3fe55ad329cbcb28471bb30f05c9827f724c76";

    # Per-server pins (follow default; replace with a direct url to override)
    nixpkgs-armer.follows = "nixpkgs";
    nixpkgs-bim.follows = "nixpkgs";
    nixpkgs-emmett.follows = "nixpkgs";
    nixpkgs-howard.follows = "nixpkgs";
    nixpkgs-mermaid.follows = "nixpkgs";
    nixpkgs-mermaid-gpu.follows = "nixpkgs";
    nixpkgs-micron.follows = "nixpkgs";

    # Project builds (local dev; follow default unless overridden)
    nixpkgs-projects.follows = "nixpkgs";

    # CI cross-builds (s390x wheels, mermaid images; follow default unless overridden)
    nixpkgs-ci.follows = "nixpkgs";
  };

  outputs =
    {
      self,
      nixpkgs,
      nixpkgs-armer,
      nixpkgs-bim,
      nixpkgs-emmett,
      nixpkgs-howard,
      nixpkgs-mermaid,
      nixpkgs-mermaid-gpu,
      nixpkgs-micron,
      nixpkgs-projects,
      nixpkgs-ci,
    }:
    { };
}