{
  description = "LaTeX environment";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
  };
  outputs = inputs @ {
    self,
    flake-parts,
    ...
  }:
    flake-parts.lib.mkFlake {inherit inputs;} (top: {
      imports = [];
      flake = {};
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];
      perSystem = {
        pkgs,
        self',
        ...
      }: let
        tex = pkgs.texlive.combine {
          inherit
            (pkgs.texlive)
            scheme-basic
            latexmk
            lipsum
            standalone
            filehook
            svn-prov
            import
            pgf
            luatex85
            ;
        };
        mainTexFileDrv = dir: file:
          pkgs.stdenvNoCC.mkDerivation rec {
            name = "${dir}/file";
            src = self;
            buildInputs = [tex];
            phases = ["unpackPhase" "buildPhase" "installPhase"];
            buildPhase = ''
              export PATH="${pkgs.lib.makeBinPath (buildInputs ++ [pkgs.coreutils])}";
              env \
                HOME=$(mktemp -d) \
                SOURCE_DATE_EPOCH=${toString self.lastModified} \
                latexmk "${dir}/${file}.tex"
            '';
            installPhase = ''
              mkdir -p $out
              cp "${dir}/${file}.pdf" $out/
            '';
          };
      in {
        legacyPackages = pkgs;

        packages.default = self'.packages.main;
        packages.main = mainTexFileDrv "main";
        packages.c01 = mainTexFileDrv "chapters" "01";
        packages.c02 = mainTexFileDrv "chapters" "02";

        devShells.default = pkgs.mkShellNoCC {
          buildInputs = [tex pkgs.texlab];
        };
      };
    });
}