Created attachment 211451 [details]
Delve is a debugger for the Go programming language
Poudriere is having issues building it:
===> Building dlv from ./cmd/dlv
go: email@example.com: Get https://proxy.golang.org/github.com/cosiner/argv/@v/v0.0.0-20170225145430-13bacc38a0a5.mod: dial tcp: lookup proxy.golang.org on 18.104.22.168:53: write udp 127.0.0.1:44960->22.214.171.124:53: write: permission denied
*** Error code 1
Given that upstream is using modules , the port's Makefile should be using USES=go:modules and all required dependencies will have to be listed in GH_TUPLE 
While here, could you please also update to the latest release (1.4.0)?
A few more things:
(1) I missed that upstream already vendors dependencies, so just USES=go:modules should be enough.
(2) ONLY_FOR_ARCHS=amd64 is probably needed because delve doesn't seem to build on either i386 or aarch64 (for different reasons)
(3) Needs CONFLICTS_INSTALL=dlv (both install bin/dlv)
Created attachment 211638 [details]
A commit references this bug:
Date: Fri Feb 14 12:38:10 UTC 2020
New revision: 526107
New port: devel/delve
Delve is a debugger for the Go programming language. The goal of the project is
to provide a simple, full featured debugging tool for Go. Delve should be easy
to invoke and easy to use. Chances are if you're using a debugger, things
aren't going your way. With that in mind, Delve should stay out of your way as
much as possible.
Submitted by: Dmitry Wagin <firstname.lastname@example.org>
Committed with small changes, thanks!