dial tcp 216.58.200.49:443: i/o timeout，recipe for target ...internal.test_coverage' failed

[meiyujack]

after executed "sudo make package-toolkit REBUILD_TOOLS=y", I got Makefile:13: CONFIG_FILE is empty, defaulting to toolkit's core-efi.json unless CONFIG_FILE="" was set explicitly.
cd /home/my/CBL-Mariner/toolkit/tools/ &&
go test -covermode=atomic -coverprofile=/home/my/CBL-Mariner/build/tools/internal.test_coverage ./...
go: github.com/alecthomas/[email protected]: Get "https://proxy.golang.org/github.com/alecthomas/template/@v/v0.0.0-20190718012654-fb15b899a751.mod": dial tcp 216.58.200.49:443: i/o timeout
/home/my/CBL-Mariner/toolkit/scripts/tools.mk:89: recipe for target '/home/my/CBL-Mariner/build/tools/internal.test_coverage' failed

No matter what I setted proxy_all, it doesn't work. I tested curl www.google.com successfully. I don't know what to do