Building spack-stack modules for JEDI

The instructions in this section are specific to building spack-stack environments to support the JEDI applications (SkyLab v3.0 release). For general information on using spack-stack to build and run software, see the spack-stack documentation.

spack-stack currently requires a basic Python version 3.8-3.10 that has nothing but the “poetry” build tool installed. On your Macbook, if your Python installation has lots of packages installed that are available by default (e.g. because you installed Python with homebrew and additional packages with homebrew or manually inside the homebrew environment), you may run into trouble. Before making any changes to the homebrew environment or otherwise modifying /usr/local, make sure to take a backup of that directory so that you can put it back if needed. The same goes for Linux.


See for general information on how to build your own spack stack on your platform. Make sure you have read through the documentation before attempting to build your own stack. The commands below only highlight the differences to the general documentation, steps in between that are not written down here are identical.

Supported in this release are macOS with clang (ewok graphics dependencies don’t build with gcc), Red Hat with gcc, Ubuntu with gcc.

Before building the spack-stack modules on macOS, you must first install homebrew and update the local path to your homebrew installation. See and for more specific information on this task. It is recommended to start with a fresh homebrew installation before setting up the spack-stack prerequisites. See for information on how to uninstall homebrew from your current environment.

Install the prerequisites:

Go to for instructions.

Check out the code:

git clone -b 1.2.0 --recursive spack-stack-1.2.0

Go into the spack-stack-1.2.0 directory and source the spack-stack script:

cd spack-stack-1.2.0

Use the following command to create the spack-stack environment for skylab-3.0:

spack stack create env --site=linux.default --template=skylab-3.0.0 --name=skylab-3.0.0

Replace linux.default with macos.default as required for your system.

Activate the skylab-3.0 spack-stack environment:

spack env activate [-p] envs/skylab-3.0.0


export SPACK_SYSTEM_CONFIG_PATH="$PWD/envs/skylab-3.0.0/site"

Build the skylab-3.0 spack-stack environment:

Go to for instructions starting with Step 3.

In the next section we describe in details how to use spack-stack modules to build and run JEDI on different platforms.