This is another follow up after having actually read the relevant info section on how to do proper testing in Guix. Checkout is at 5422920b9eaaa0c6bf779588748595c66ca86ba3, and this time I prepared a test-suite.log with all errors that happen. Please find it attached. This time it isn't too big either. Unfortunately ‘tests/processes.scm’ hangs too, or remains unresponsive after several minutes. I really wonder what is making all the tests fail. I've tried building the sources on different machines, or on clean user accounts. They all fail in the same way. Has someone else been experiencing this yet? Kind regards, Simon