The Julia ecosystem has a rich set of open source packages. When packages are designed with a single objective, they can be reused more easily; however, working with a large codebase is not an easy task because it is more likely to depend on third-party packages. It takes a considerable amount of time and effort for a developer to maintain and manage these dependencies in order to avoid dependency hell.

It is important to understand that dependencies exist not just between packages, but also between specific versions of packages. Luckily, the Julia language has strong support for semantic versioning, which can help solve a lot of problems.

In this section, we will cover the following topics:

• Understanding the semantic versioning scheme
• Specifying dependencies for Julia packages
• Avoiding circular dependencies

Now, let's take a quick look at the semantic versioning scheme.