SOUCE_DATE_EPOCH environment variable is used for reproducible build. But, even default configuration is disabled for reproducible
build, SOURCE_DATE_EPOCH is always set. Then, built on the Linux environment with default configuration shows as follows:

- -Xinternalversion time information becomes UTC
- time is build starting time, not compiled time.

This issue is not affected on the Windows environment, because a comipiler does not refer SOUCE_DATE_EPOCH environment variable.
I think SOURCE_DATE_EPOCH environment variable should not be set by default configuration.