I believe it was an encoding error:    ....   but I can no longer reproduce it....  ```  https://github.com/NixOS/nixpkgs/pull/98283  11 packages built:  bwa python27Packages.acebinf python27Packages.pytabix python37Packages.acebinf python37Packages.bwapy python37Packages.pytabix python38Packages.acebinf python38Packages.bwapy python38Packages.pytabix tebreak truvari  ```