Manage dependencies in Elixir projects using Mix, Elixir's build tool. Add dependencies to your mix.exs file and run `mix deps.get` to fetch them. Use version constraints for stability.

Managing dependencies in Elixir projects is streamlined through Mix, the built-in build tool and package manager. To add a new dependency, you simply modify your mix.exs file, which contains all the project configurations, including dependencies. In the deps function of your project module, you can specify the libraries your project requires, along with their version constraints. For example, to add the Phoenix framework, you would include it as follows: {:phoenix, "~> 1.5"}. This version constraint ensures that you receive minor updates while avoiding breaking changes introduced in major versions. After updating your mix.exs, run the command mix deps.get to fetch and install the specified dependencies. Mix will automatically resolve dependency conflicts and download the required packages, making it easy to manage your project's ecosystem. Additionally, it’s essential to keep your dependencies up to date. Use mix deps.update followed by the dependency name to refresh specific libraries. You can also periodically review your dependency tree using mix deps to identify any outdated or unused libraries. By effectively managing dependencies with Mix, you can ensure that your Elixir projects remain stable and maintainable as they evolve.