# Magic Leap demo First, install v0.20.0 or later of the Magic Leap SDK. By default this is installed in `MagicLeap/mlsdk/`, for example: ``` export MAGICLEAP_SDK=~/MagicLeap/mlsdk/v0.20.0 ``` You will also need a signing certificate. ``` export MLCERT=~/MagicLeap/cert/mycert.cert ``` Now build the pathfinder demo library and `.mpk` archive: ``` cd demo/pathfinder make release ``` The `.mpk` can be installed: ``` make install ``` and run: ``` make run ```