There's a closed pull request on the void-packages repository

go: add build_style=go to avoid code duplication
https://github.com/void-linux/void-packages/pull/20435

Description:
The GOARCH selection snippet was duplicated in the go build_style script
for environment variables and in the go template itself. Furthermore,
there were discrepancies between the two snippets, which have been
fixed.

This makes the go template leaner, and makes both cases more robust (changes to GOARCH selection can be done in a single place).