Unicode is not supported

[Hubbitus]

Hello.
Thank you for such universal building image.

When I've tried to build my model which have named "Оператор Газпром ИД" I see in logs:

[LoadModelFromRepositoryProvider] Loading model at /model
[LoadModelFromRepositoryProvider] Loaded model: '???????? ??????? ??'

I've tried also provide LANG=en_US.UTF-8 env variable, but then see in log additional:

(process:40): Gtk-WARNING **: 00:19:50.117: Locale not supported by C library.
        Using the fallback 'C' locale.