pkgs.formats.json alters integers in options due to use of jq

[anna328p]

Describe the bug

$ nix-build -E '((import <nixpkgs> {}).formats.json {}).generate "file.json" 165998239273844736'
/nix/store/c4qchpr6bi0yk168gaj1k1fv9lkqx3p6-file.json

$ cat /nix/store/c4qchpr6bi0yk168gaj1k1fv9lkqx3p6-file.json
165998239273844740

Expected behavior

I expected the file to contain the integer given as input.

Additional context

https://github.com/NixOS/nixpkgs/blob/master/pkgs/pkgs-lib/formats.nix#L46

$ jq . <<< "165998239273844736"
165998239273844740

jqlang/jq#369

Notify maintainers

Metadata

• system: "x86_64-linux"
• host os: Linux 5.14.21, NixOS, 22.05 (Quokka)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.4
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute: formats.json
# a list of nixos modules affected by the problem
module:

[anna328p]

as an interim solution, i'm using configFile = pkgs.writeText "config.json" (builtins.toJSON cfg.config);