Hopefully everything necessary is in the nix-shell. If not, feel free to modify nix-stuff and make it work.

Common things are kept in the `justfile`, for ease of execution. Just is in the nix-shell, if you don't have `just` and have Nix.

Formatting of Haskell should be done with `stylish-haskell`, which is in the nix-shell if you don't have it. This is the command I used: `stylish-haskell --inplace -r app/*.hs`

Formatting of the Cabal file can be done with `cabal-fmt`, which is also in the nix-shell. This is the command I used: `cabal-fmt --inplace --indent 2 ./datatypetool.cabal`

Formatting of Nix should be done with `nixfmt`, which is also in the nix-shell. This is the command I used: `nixfmt shell.nix nix/*`