Prerequisites: Java Development Kit (JDK), tested with OpenJKDK 25
First download the OSV2020 source code:
./download-osv2020-code.sh
Then install the apportionment wrapper:
./gradlew installDist
Copyright © 2026 Kiesraad. Licenced under EUPL-1.2. The OSV2020 source code is not released under EUPL-1.2 but under its own licence, included in the zip file with the code.