Also, frustratingly, ”_unix.go" doesn't work IIRC even though "unix" is a built-in build tag, because the ending thing only works with platform names. You need

Also, frustratingly, ”_unix.go" doesn't work IIRC even though "unix" is a built-in build tag, because the ending thing only works with platform names. You need to manually do "//go:build +unix" in the file.