EIB and NCO have installed a test version of spack-stack/1.6.0 on Cactus. This version of spack-stack has been used to build GDASApp at 764f58c. g-w CI was run for JEDI based DA. All jobs in all streams successfully ran to completion. The Cactus spack-stack/1.6.0 installation remains experimental. It is not ready for general use.

This issue is opened to document the use of spack-stack on WCOSS2.