# Mix config evolutions

**URL:** <https://forum.elixirforum.com/t/mix-config-evolutions/4423>\
**Category:** Discussions\
**Tags:** mix\
**Created:** [April 2, 2017, 3:41am UTC](https://forum.elixirforum.com/t/mix-config-evolutions/4423 "2017-04-02T03:41:16Z")\
**Posts on this page:** 1\
**Showing post:** 12

<div class="post-metadata">

**Author:** ![OvermindDL1](https://forum.elixirforum.com/user_avatar/forum.elixirforum.com/overminddl1/32/2677_2.png) [@OvermindDL1](https://forum.elixirforum.com/u/OvermindDL1)\
**Post date:** [April 4, 2017, 3:10pm UTC](https://forum.elixirforum.com/t/mix-config-evolutions/4423/12 "2017-04-04T15:10:42Z")

</div>

A big issue I have with configs in projects is that they tend to be very hardcoded, such as they use a build-time only config.exs setup that does not support environment variables, or they only check environment variables when it is going to be hosted on a system that cannot set them, etc… They are highly inflexible…

---

_[View the full topic](https://forum.elixirforum.com/t/mix-config-evolutions/4423)._