Having a trailing comma before a space doesn't mean that the next option will be ANDed rather than ORed. This worked with the standard toolchain because the filenames prevented the incorrect build constraints for other platforms from being acted on. Change-Id: Iaee5b60a7496166f23fc36319abe07c7a7ec04e5 Reviewed-on: https://go-review.googlesource.com/32311 Run-TryBot: Adam Langley <agl@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>