{
  description = "cl-yag static site generator";
  inputs = {
    cl-nix-lite.url = "github:hraban/cl-nix-lite";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
    flake-utils.url = "github:numtide/flake-utils";
  };
  outputs = {
    self, nixpkgs, cl-nix-lite, flake-utils
  }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system}.extend cl-nix-lite.overlays.default;
        mm-sh = pkgs.writeShellScriptBin "mm-sh" ''
          #!/bin/sh
          cat $2 |perl -0pe 's/\[\^(.*?)\]\:(.*?)(\n\n)/\<span class="marginnote"\>\2\<\/span\>/gms' > $1.tmp
          #    perl -0pe 's/\[\^(.*?)\][^:]/\<label for\="\1" class\="margin-toggle"\>/gms' 
          multimarkdown -t html -o $1 $1.tmp && cat $1 |
                  perl -0pe 's/(\<h2|^)(.*?)(?=(\<h2)|\Z)/\n\<section\>\n\1\2\n<\/section\>\n/gms' |
                  perl -0pe 's/(\<blockquote\>.*?\<\/blockquote\>)/\<div class="epigraph"\>\n\1\n\<\/div\>/gms' |
                  perl -0pe 's/(\<blockquote\>.*?)\n(–.*?)(\<\/blockquote\>)/\1\<footer\>\2\<\/footer\>\3/gms' > $1.new && mv $1.new $1
          rm $1.tmp
        '';

        move-links = pkgs.writers.writePython3Bin "move-links" { libraries = [ ]; } ''
          import sys
          import re

          lines = "".join(sys.stdin.readlines())
          link = re.compile("([[^]]*]([^)]+))")
          link_split = re.compile("[([^]]*)](([^)]+))")
          marginnotes = re.compile("([^.*?]:.*?\n\n)", re.DOTALL | re.MULTILINE)

          _lines = marginnotes.sub("", lines)
          lines = _lines

          links = link.findall(lines)

          i = 1
          for _link in links:
              lines = lines.replace(_link, "[%s]" % i)
              i += 1

          i = 1
          lines += "\n\n"
          for _link in links:
              ls = link_split.match(_link)
              lines += "=> %s %s\n" % (ls[2], ls[1])
              i += 1

          sys.stdout.write(lines)
        '';

      in 
      {
        packages = {
          staticSite = with pkgs.lispPackagesLiteFor pkgs.ecl; lispDerivation {
            name = "thoughts";
            lispSystem = "thoughts";
            lispDependencies = [
              asdf
              arrow-macros
            ];
            src = pkgs.lib.cleanSource ./generator.lisp;
            meta = {
              license = pkgs.lib.licenses.agpl3Only;
            };

            buildInputs = [
              pkgs.ecl
              pkgs.git
              pkgs.gnumake
              pkgs.asdf
              pkgs.perl
              pkgs.multimarkdown
              pkgs.sass
              mm-sh
              move-links
            ];

            phases = [ "unpackPhase" "installPhase" "cleanupPhase" ];

            unpackPhase = ''
              mkdir -p $TMPDIR
              cp ${./generator.lisp} $TMPDIR/generator.lisp
              mkdir -p $TMPDIR/data
              cp -r ${toString ./data}/* $TMPDIR/data/
              mkdir -p $TMPDIR/templates
              cp -r ${toString ./templates}/* $TMPDIR/templates/
              mkdir -p $TMPDIR/static
              cp -r ${toString ./static}/* $TMPDIR/static/
            '';

            installPhase = ''
              mkdir -p $out/html/static
              mkdir -p $out/gemini
              mkdir -p $TMPDIR/output/gemini/articles
              mkdir -p $TMPDIR/output/html
              mkdir -p $TMPDIR/temp/data
              cd $TMPDIR
              sass static/css/style.scss $out/html/static/style.css
              ecl --load $TMPDIR/generator.lisp
              cp -r $TMPDIR/static/fonts $out/html/static
              cp -r $TMPDIR/static/img $out/html/static
              cp -r $TMPDIR/output/html/* $out/html/
              cp -r $TMPDIR/output/gemini/* $out/gemini/
              cp -r $TMPDIR $out/tmpdir
            '';

            cleanupPhase = ''
              rm -rf $TMPDIR/temp
            '';
          };
        };

        devShell = pkgs.mkShell {
          buildInputs = [
            pkgs.ecl
            pkgs.git
            pkgs.gnumake
            pkgs.asdf
            pkgs.perl
            pkgs.multimarkdown
            pkgs.sass
          ];
          shellHook = ''
            echo "Welcome to the development shell for cl-yag static site generator!"
          '';
        };
      });
  }