Old CentOS Linux snowflake: go.mod at revision v1.1.0: unknown revision v1.1.0

Hello, i have followed https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/wikis/home#source-code and "go build" output:

go: git.torproject.org/pluggable-transports/goptlib.git@v1.1.0: reading git.torproject.org/pluggable-transports/goptlib.git/go.mod at revision v1.1.0: unknown revision v1.1.0

also in the tutorial i would replace:

Build the Snowflake proxy.

go build

by:

Build the Snowflake proxy.

cd snowflake;go build

as it does not work without going to the git cloned dir.