## Required dependencies

{! backend/installation/erlang_elixir_requirements.include !}
* PostgreSQL >=11.0
* git
* file / libmagic
* gcc or clang
* GNU make
* CMake

## Optional dependencies

* ImageMagick
* FFmpeg
* exiftool

!!!info
    **Source installs only**  
    If your operating system repositories don't meet the Elixir/Erlang requirements, check [Installing newer versions of Elixir and Erlang](./installing_newer_elixir_erlang.md).