message: tolerate multiple copies of
diff: @@ -5,9 +5,13 @@ const {
  getOwner
  } = require('@glimmer/di');
  const resolve = require('resolve');
  -const injectionSymbol = Symbol('@cardstack/di/injections');
  const path = require('path');
  +// Tolerate multiple distinct copies of this module
  +if (!global.__cardstack_injection_symbol__) {
  + global.__cardstack_injection_symbol__ = Symbol('@cardstack/di/injections');
  +}
  +const injectionSymbol = global.__cardstack_injection_symbol__;
  exports.declareInjections = function(injections, klass) {
  klass[injectionSymbol] = injections;
  