Backblaze's CLI tool is relying on `have` function which is deprecated[1] and gets dereferenced[2] at the end of `bash-completion`. This causes issues for NixOS because those bash completions are run after bash-completion[3] has already run and unset the `have` function. [1]4d88339928/bash_completion (L114)[2]4d88339928/bash_completion (L2103)[3]80b6513fbf/nixos/modules/programs/bash/bash.nix (L22)