this derivation will be built: /nix/store/s8a6mf5x9w8p54742byfl72n2k3k2cad-bcachefs-module-7.0.0-38-generic.drv building '/nix/store/s8a6mf5x9w8p54742byfl72n2k3k2cad-bcachefs-module-7.0.0-38-generic.drv'...