React Warnings don't use sourcemaps

Is there a way to get React’s warnings to use the sourcemaps, instead of giving me something like modules.js:15463 - that’s not useful for determining which module is generating the warning.

modules.js:15463 Warning: Accessing createClass via the main React package is deprecated, and will be removed in React v16.0. Use a plain JavaScript class instead. If you're not yet ready to migrate, create-react-class v15.* is available on npm as a temporary, drop-in replacement. For more info see https://fb.me/react-create-class
printWarning @ modules.js:15463
modules.js:15463 Warning: Accessing PropTypes via the main React package is deprecated, and will be removed in  React v16.0. Use the latest available v15.* prop-types package from npm instead. For info on usage, compatibility, migration and more, see https://fb.me/prop-types-docs
printWarning @ modules.js:15463