# Real-World Event Sourcing: Missing setup instructions (page 3)

**URL:** <https://forum.devtalk.com/t/real-world-event-sourcing-missing-setup-instructions-page-3/186531>\
**Category:** PragProg Customers\
**Tags:** suggestion, book-real-world-event-sourcing\
**Created:** [5 February 2025 23:38 UTC](https://forum.devtalk.com/t/real-world-event-sourcing-missing-setup-instructions-page-3/186531 "2025-02-05T23:38:54Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jaeyson](https://forum.devtalk.com/user_avatar/forum.devtalk.com/jaeyson/32/6395_2.png) [@jaeyson](https://forum.devtalk.com/u/jaeyson)\
**Post date:** [23 March 2025 00:33 UTC](https://forum.devtalk.com/t/real-world-event-sourcing-missing-setup-instructions-page-3/186531/2 "2025-03-23T00:33:57Z")

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I’m also at the beginning of reading the book. I’d assume the author meant installing the [language](https://elixir-lang.org/install.html).

> go ahead and create this module as calculator .exs. Start up iex and enter c(“calculator .exs”) to load and compile the module

You can access `iex` shell after installing Elixir successfully. The `c("calculator.exs")` is typed once you’re inside `iex` shell.

> On the website it states: “What You Need: You’ll need a computer preferably running MacOS, Linux, or WSL/Ubuntu on Windows. You’ll install everything else you need (such as Elixir and an event store) as you progress through the book.”

Not sure if they’ll update this to be less ambiguous

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