Missing dependency on findutils

[nbraud]

While attempting to use devour-flake in CI, I ran into the following bug:

/nix/store/yhmxdqspqchpd8cb15gwc8ybpiybh5bz-devour-flake/bin/devour-flake: line 15: xargs: command not found
warning: not writing modified lock file of flake 'path:/nix/store/cc4dp3h7nck0w6xz0jfsbchyklfmblry-p8vfkmfh43yy8lmz1r65dr9yq3ql7cd7-source':
• Added input 'flake':
    'path:/nix/store/lklg6iihnwkxfxcwj8ik1a145z4296cc-source?lastModified=0&narHash=sha256-M%2BBd3q9raBWjZsVxWzEKusGlKcQAqvp4zisplb%2BQwqM%3D' (1970-01-01)
• Added input 'flake/devour-flake':
    'github:srid/devour-flake/30a34036b29b0d12989ef6c8be77aa949d85aef5' (2023-09-07)
• Added input 'flake/flake-utils':
    'github:numtide/flake-utils/ff7b65b44d01cf9ba6a71320833626af21126384' (2023-09-12)
• Added input 'flake/flake-utils/systems':
    'github:nix-systems/default/da67096a3b9bf56a91d16901293e51ba5b49a27e' (2023-04-09)
• Added input 'flake/nixpkgs':
    'github:NixOS/nixpkgs/90e85bc7c1a6fc0760a94ace129d3a1c61c3d035' (2023-10-29)
error: writing to file: Broken pipe

Here's the full CI run