Hi guix, the fenics package tests fail and it looks like the tests are run 3 times concurrently. Every test name is printed three times in the build log, for example here: https://ci.guix.gnu.org/build/1039880/log/raw This is the maximum number of parallel jobs of the test run and if I increase it, I get more print outputs. AFAIK, pytest doesn't support mpi, so I don't see why the tests are executed this way. Anyhow, in the attached patch, the tests are executed directly using pytest. This prevents the tests from getting stuck and subsequently I discovered a failure in XDMF tests. With this test also disabled, the package builds fine for me. Maybe a fenics or mpi expert can tell if this patch makes sense? Best regards, Ontje