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# Upgrades
This is a top page for detectors not included in Run 3 layout.


# Installation
To enable the compilation of this section you need to have the environment variable `ENABLE_UPGRADES=ON` set.
An example for the installation command is:

```bash
ENABLE_UPGRADES=ON aliBuild build O2 --defaults o2
```

Currently two sections are included:
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* \subpage refDetectorsUpgradesALICE3TRK
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