Getting key4hep

With CVMFS

System prerequisites

Before sourcing the setup script, make sure the required operating-system packages are installed. See the LCG Releases prerequisites for the supported platforms and the current package requirements.

Setup

Two builds with the key4hep stack are distributed on cvmfs. The releases happen every few months on demand (for example, if there is a new important feature or a breaking change) and at the moment AlmaLinux 9 (EL9, Rocky Linux 9), Ubuntu Ubuntu 24.04 are supported. Some older releases also were built for CentOS7 and Ubuntu 22.04. For sourcing the releases, run:

source /cvmfs/sw.hsf.org/key4hep/setup.sh

In addition, nightly builds for AlmaLinux 9 and Ubuntu 26.04 with the latest version of most of the packages are available:

source /cvmfs/sw-nightlies.hsf.org/key4hep/setup.sh

The setup.sh script always points to the latest build and it will change without warning. However, after sourcing the script some information will be displayed with instructions on how to reproduce the current environment.

Warning

Nightly builds are intended for development and testing and they will be deleted after some time from /cvmfs. They will also introduce new features unannounced, so don’t use these for anything else than development!