{
  description = "Personal website";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";

    word-embedding-golf = {
      url = "github:anerisgreat/word-embedding-golf";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    ar-globe-explorer = {
      url = "github:anerisgreat/ar-world-border-viewer";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, flake-utils, ... } @ inputs:
    flake-utils.lib.eachSystem [ "x86_64-linux" "aarch64-linux" ] (system:
      let
        pkgs = import nixpkgs { inherit system; };

        wordEmbeddingGolfPkg = inputs.word-embedding-golf.packages.${system}.default;

        arGlobeExplorerPkg = inputs.ar-globe-explorer.packages.${system}.default;

        site = pkgs.stdenv.mkDerivation {
          name = "personal-site";
          src = pkgs.lib.cleanSource ./.;

          nativeBuildInputs = [ pkgs.emacs-nox ];

          buildPhase = ''
            mkdir -p public
            export HOME=$(mktemp -d)
            emacs --batch --load ./build.el
          '';

          installPhase = ''
            cp -r public/. $out/

            mkdir -p $out/word-embedding-golf
            cp -r ${wordEmbeddingGolfPkg}/. $out/word-embedding-golf/

            mkdir -p $out/ar-globe-explorer
            cp -r ${arGlobeExplorerPkg}/. $out/ar-globe-explorer/

            # Inject a "back to site" banner into all sub-project HTML pages
            BANNER='<div id="back-banner" style="position:fixed;top:0;left:0;right:0;padding:.4rem 1rem;background:rgba(0,0,0,.82);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:9999;font-family:-apple-system,BlinkMacSystemFont,sans-serif;font-size:.82rem;border-bottom:1px solid rgba(255,255,255,.08);"><a href="/" style="color:#93c5fd;text-decoration:none;font-weight:500;">← aner.zakobar.com</a></div>'
            for dir in $out/word-embedding-golf $out/ar-globe-explorer; do
              find "$dir" -name "*.html" | while IFS= read -r f; do
                sed -i -E "s|<body([^>]*)>|<body\1>$BANNER|" "$f"
              done
            done
          '';
        };

        serve = pkgs.writeShellApplication {
          name = "serve";
          runtimeInputs = [ pkgs.python3 pkgs.psmisc ];
          text = ''
            fuser -k 8080/tcp 2>/dev/null || true
            echo "Serving site at http://localhost:8080"
            exec python -m http.server --bind 0.0.0.0 8080 -d ${site}
          '';
        };

        tunnel = pkgs.writeShellApplication {
          name = "tunnel";
          runtimeInputs = [ pkgs.python3 pkgs.cloudflared pkgs.qrencode ];
          text = ''
            echo "Starting local server and Cloudflare tunnel..."
            echo ""

            echo "Starting local server on http://localhost:8080..."
            python -m http.server --bind 0.0.0.0 8080 -d ${site} &
            SERVER_PID=$!

            sleep 2

            echo ""
            echo "Starting HTTPS tunnel..."
            echo "Use the QR code below on your device:"
            echo ""

            cloudflared tunnel --url http://localhost:8080 2>&1 | \
              while IFS= read -r line; do
                echo "$line"
                if echo "$line" | grep -q "https://.*trycloudflare.com"; then
                  URL=$(echo "$line" | grep -o "https://[^ ]*trycloudflare.com")
                  echo ""
                  echo "=========================================="
                  echo "TUNNEL URL: $URL"
                  echo "=========================================="
                  echo ""
                  echo "QR Code:"
                  echo ""
                  qrencode -t ANSIUTF8 "$URL"
                  echo ""
                fi
              done

            kill $SERVER_PID 2>/dev/null
          '';
        };

        new-thing = pkgs.writeShellApplication {
          name = "new-thing";
          runtimeInputs = [ pkgs.coreutils pkgs.gnused ];
          excludeShellChecks = [ "SC2001" ];
          text = ''
            if [ $# -lt 3 ]; then
              echo "Usage: new-thing \"Title\" \"flake-url\" \"Short description\""
              exit 1
            fi
            title="$1"
            flake_url="$2"
            desc="$3"
            slug=$(echo "$title" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/-/g' | sed 's/-\+/-/g' | sed 's/^-//;s/-$//')
            camel=$(echo "$slug" | sed 's/-\([a-z]\)/\u\1/g')
            filename="things/''${slug}.org"
            mkdir -p things
            cat > "$filename" <<EOF
#+THINGS_TITLE: $title
#+THINGS_DESC: $desc
#+THINGS_PATH: $slug
#+THINGS_FLAKE: $flake_url
EOF
            echo "Created: $filename"
            echo ""
            echo "Add to flake.nix inputs:"
            echo "  ''${slug} = {"
            echo "    url = \"$flake_url\";"
            echo "    inputs.nixpkgs.follows = \"nixpkgs\";"
            echo "  };"
            echo ""
            echo "Add let binding before 'site =':"
            echo "  ''${camel}Pkg = inputs.''${slug}.packages.\''${system}.default;"
            echo ""
            echo "Add to installPhase after 'cp -r public/. \$out/':"
            echo "  mkdir -p \$out/''${slug}"
            echo "  cp -r \''${''${camel}Pkg}/. \$out/''${slug}/"
            echo ""
            echo "Then run: nix flake lock"
          '';
        };

        new-post = pkgs.writeShellApplication {
          name = "new-post";
          runtimeInputs = [ pkgs.coreutils pkgs.gnused ];
          text = ''
            if [ $# -eq 0 ]; then
              echo "Usage: new-post \"Post Title\""
              exit 1
            fi
            title="$*"
            slug=$(echo "$title" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/-/g' | sed 's/-\+/-/g' | sed 's/^-//;s/-$//')
            date=$(date +%Y-%m-%d)
            filename="content/blog/''${date}-''${slug}.org"
            mkdir -p content/blog
            cat > "$filename" <<EOF
#+TITLE: $title
#+DATE: $date

*

EOF
            echo "Created: $filename"
          '';
        };

      in {
        packages.default = site;

        devShells.default = pkgs.mkShell {
          packages = [ new-post new-thing pkgs.nodejs ];
        };

        apps = {
          default = {
            type = "app";
            program = "${serve}/bin/serve";
          };
          tunnel = {
            type = "app";
            program = "${tunnel}/bin/tunnel";
          };
        };
      }
    );
}