{
  perSystem =
    {
      pkgs,
      lib,
      config,
      self',
      ...
    }:
    {
      devShells = {
        default = pkgs.mkShell {
          packages = builtins.attrValues {
            inherit (pkgs)
              age
              fuse
              gitmoji-cli
              graphviz
              imv
              just
              nixfmt
              just-lsp
              # restic
              rust-analyzer
              rustfmt
              litemdview
              nil
              openssl
              pqiv
              sops
              ssh-to-age
              taplo
              vscode-langservers-extracted
              watchexec
              ;
          };
          # AWS_ACCESS_KEY_ID = "";
          # AWS_SECRET_ACCESS_KEY = "";
          # RESTIC_PASSWORD_FILE = "pass.txt";
          # RESTIC_REPOSITORY = "";
          shellHook = "${config.pre-commit.installationScript}";
        };
      };

      pre-commit.settings.hooks = {
        nixfmt-rfc-style.enable = true;
        commitizen.enable = true;
      };

      treefmt = {
        programs = {
          nixfmt-rfc-style.enable = true;
          cabal-fmt.enable = true;
          commitizen.enable = true;
          deadnix.enable = true;
          elm-format.enable = true;
          hlint.enable = true;
          mdformat.enable = true;
          nixfmt = {
            enable = true;
            width = 200;
          };
          ormolu.enable = true;
          rustfmt.enable = true;
          statix.enable = true;
          taplo.enable = true;
          typstyle.enable = true;
          yamlfmt.enable = true;
        };
      };
    };
}