this derivation will be built: /nix/store/xnp1psxlj7x4xhz46s7f8n39vqng356x-bcachefs-module-7.0.0-39-generic.drv building '/nix/store/xnp1psxlj7x4xhz46s7f8n39vqng356x-bcachefs-module-7.0.0-39-generic.drv'...