*** Shawn K. Quinn [2021-07-11 14:42]:
>go: go.cypherpunks.ru/balloon@v1.1.1: unrecognized import path
>How to fix?

Go should not download anything outside, because all dependencies are in
src/vendor directory and bin/default.do target has "build -mod=vendor"
forcing that directory usage.

So that is strange why your Go does not use vendored packages? I checked
NNCP 7.3.1 building with Go 1.13.15 -- everything is fine.

Well, except that I did not modify bin/hjson-cli.do building to use
-mod=vendor: http://www.git.cypherpunks.ru/?p=nncp.git;a=commitdiff;h=947ac9d7dcacebd864cfdea7b3e03b54b898693a
But anyway that hjson-cli utility does not depend or related to
go.cypherpunks.ru's packages.

Can you tell what Go version you use and can you run redo with the
tracing to see what exact commands are running?
Something like "redo -x" or "contrib/do -c -x all".

Packaging and vendoring in NNCP tarballs have not been changed or
touched for a long time.

-- 
Sergey Matveev (http://www.stargrave.org/)
OpenPGP: CF60 E89A 5923 1E76 E263  6422 AE1A 8109 E498 57EF