What Does 'incompatible' Mean in My Go.mod File?

Understanding "incompatible" in go.mod

When using Go modules, you may come across the term "incompatible" in the go.mod file. This indicates that the dependency in question has not explicitly opted into Go module support.

Specifically, for libraries that have not opted into Go modules:

• If they have valid semver tags (v0.x.y or v1.x.y), Go will assign a pseudo-version, e.g., github.com/kolo/xmlrpc v0.0.0-20190717152603-07c4ee3fd181.
• If they have valid semver tags and a major version of 2 or higher (v2.x.y or higher), Go will mark them as incompatible, e.g., github.com/zeromq/goczmq v4.1.0 incompatible.

The key point to remember is that incompatible does not necessarily mean there is a problem. It simply indicates that the library is not officially supporting Go modules. As long as the library works as expected, there is no reason to worry. However, it is important to be aware that you may encounter unexpected behavior if you use a feature that is not compatible with the library's current version.

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