synapse-admin: use fetchYarnDeps

{ lib

, fetchFromGitHub

, fetchYarnDeps

, mkYarnPackage

, baseUrl ? null

}:

    sha256 = "sha256-kvQBzrCu1sgDccKhr0i2DgDmO5z6u6s+vw5KymttoK4=";

  };

  yarnNix = ./yarn.nix;

  yarnLock = ./yarn.lock;

  packageJSON = ./package.json;

  offlineCache = fetchYarnDeps {

    inherit yarnLock;

    hash = "sha256-f0ilsF3lA+134qUaX96mdntjpR4gRlmtRIh/xEFhtXQ=";

  };

  NODE_ENV = "production";

  ${if baseUrl != null then "REACT_APP_SERVER" else null} = baseUrl;