Created attachment 219813 [details]
Properly switch to USES=go:modules and do some cleanup in preparation for the upcoming go1.16 release.
Builds fine on 12.2-RELEASE amd64 with both current lang/go 1.15.5 and lang/go-devel@399b5d14d411
Thank you for the patch!
I will test it tonight.
A commit references this bug:
Date: Fri Nov 20 09:19:30 UTC 2020
New revision: 555753
net/concourse-fly: Update to 6.7.1
`patch-vendor_golang.org_x_sys_unix_ztypes__freebsd__arm64.go` is removed
because it was integrated upstream.
Thanks to dmgk@, the Makefile is switched to use USES=go:modules and cleaned up
in preparation for the upcoming Go 1.16 release; see PR 251256 .
Submitted by: dmgk@ 
Committed, thank you!