Hello, > A (preferred): replace guile-2.2 with guile-3.0 in 'inputs'. But perhaps > guile-cv does not (yet) support guile-3.0 (there have been a few incompatible > 2.2 -> 3.0 changes) > or > B: your patch, and rename guile-cv to guile2.2-cv. I tested to build guile-cv with guile-3.0. But guile-cv's test is failed, so your suggesion A is not easy. Therefore, I think suggesion B is better. Best Regards, -- Masaya Tojo