this derivation will be built: /nix/store/7ycqs7iak1vsadwi7gvdfh4vf3lgd8y1-bcachefs-module-7.0.0-38-generic.drv building '/nix/store/7ycqs7iak1vsadwi7gvdfh4vf3lgd8y1-bcachefs-module-7.0.0-38-generic.drv'...