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+# Packer
+
+## About
+[Packer](https://www.packer.io/) is a command-line tool to create virtual machines 
+based on a source configuration file.
+
+## Requirements
+To use packer you need to download and install it (compare [Install Packer](https://www.packer.io/docs/installation.html)). 
+
+## Usage
+A simple build of the vagrant box can be done by:
+```
+packer build riot.json
+```
+This command must be executed in the packer directory [RIOT/dist/tools/packer](https://github.com/RIOT-OS/RIOT/tree/master/dist/tools/packer).
+Note that the build process might take several minutes.
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