nixos/pkgs/helix/package.nix

{
  inputs,
  stdenv,
  callPackage,
  buildEnv,
  lib,
}: let
  inherit (stdenv.hostPlatform) system;
  inherit (inputs.helix.packages."${system}") helix;
  runtime = callPackage ./runtime.nix {};
  helix' = helix.overrideAttrs (
    _final: prev: let
      helix-runtime = buildEnv {
        name = "helix-runtime";
        paths = [
          runtime
          prev.env.HELIX_DEFAULT_RUNTIME
        ];
      };
    in {
      env.HELIX_DEFAULT_RUNTIME = toString helix-runtime;
    }
  );
in
  helix'
  // {
    passthru =
      (helix'.passthru or {})
      // {
        languages = lib.pipe "${helix.src}/languages.toml" [
          builtins.readFile
          builtins.fromTOML
        ];
      };
  }