Hello David,
> (("/gnu/store/ps30mn7xq0ymcrdzlwim8pkv1czgv2zf-profile.drv") 0) > ERROR: In procedure read: > In procedure scm_lreadr: #<unknown port>:16:634: Unknown # object: #\< This is probably a consequence of me breaking things today. I restored the original handling of package licenses with b5f2a035. This means that you need to uses non "#f" licenses in your custom packages to avoid the issue you encountered in https://issues.guix.gnu.org/44370. Could you please confirm that it works? Thanks, Mathieu