office-ui-fabric-react bundle included in resulting package

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Hello, with bundle analyzer noticed that fabric ui bundle is included in my resulting package.
Im using @microsoft/office-ui-fabric-react-bundle instead of office-ui-fabric-react to avoid fabric ui being added to every webpart package.
Anyway, even without SPFX's version of Fabric UI it's still included in the package.

Here's code which imports sp-client-custom-fields

import { PropertyFieldPicturePicker } from 'sp-client-custom-fields/lib/PropertyFieldPicturePicker';
import { PropertyFieldColorPicker } from 'sp-client-custom-fields/lib/PropertyFieldColorPicker';

As you can see on the picture it's including almost whole Fabric UI.
Is there any way to make it an external library?