diff --git a/pkgs/flow-control/old/build.zig.zon.nix b/pkgs/flow-control/old/build.zig.zon.nix
new file mode 100755
index 0000000..76180ab
--- /dev/null
+++ b/pkgs/flow-control/old/build.zig.zon.nix
@@ -0,0 +1,235 @@
+# generated by zon2nix (https://github.com/Cloudef/zig2nix)
+
+{
+  lib,
+  linkFarm,
+  fetchurl,
+  fetchgit,
+  runCommandLocal,
+  zig,
+  name ? "zig-packages",
+}:
+
+let
+  unpackZigArtifact =
+    { name, artifact }:
+    runCommandLocal name { nativeBuildInputs = [ zig ]; } ''
+      hash="$(zig fetch --global-cache-dir "$TMPDIR" ${artifact})"
+      mv "$TMPDIR/p/$hash" "$out"
+      chmod 755 "$out"
+    '';
+
+  fetchZig =
+    {
+      name,
+      url,
+      hash,
+    }:
+    let
+      artifact = fetchurl { inherit url hash; };
+    in
+    unpackZigArtifact { inherit name artifact; };
+
+  fetchGitZig =
+    {
+      name,
+      url,
+      hash,
+      rev ? throw "rev is required, remove and regenerate the zon2json-lock file",
+    }:
+    let
+      parts = lib.splitString "#" url;
+      url_base = lib.elemAt parts 0;
+      url_without_query = lib.elemAt (lib.splitString "?" url_base) 0;
+    in
+    fetchgit {
+      inherit name rev hash;
+      url = url_without_query;
+      deepClone = false;
+    };
+
+  fetchZigArtifact =
+    {
+      name,
+      url,
+      hash,
+      ...
+    }@args:
+    let
+      parts = lib.splitString "://" url;
+      proto = lib.elemAt parts 0;
+      path = lib.elemAt parts 1;
+      fetcher = {
+        "git+http" = fetchGitZig (
+          args
+          // {
+            url = "http://${path}";
+          }
+        );
+        "git+https" = fetchGitZig (
+          args
+          // {
+            url = "https://${path}";
+          }
+        );
+        http = fetchZig {
+          inherit name hash;
+          url = "http://${path}";
+        };
+        https = fetchZig {
+          inherit name hash;
+          url = "https://${path}";
+        };
+      };
+    in
+    fetcher.${proto};
+in
+linkFarm name [
+  {
+    name = "flow_syntax-0.1.0-X8jOoU8VAQCOYNTiuB7y2aIBP1V3OXXHa8WvE3eXtpDK";
+    path = fetchZigArtifact {
+      name = "syntax";
+      url = "git+https://github.com/neurocyte/flow-syntax?ref=master#10b92330cf0ecaa39a52d3a8d190f7fb384b7b09";
+      hash = "sha256-w6h8KN6oNS5PPTgOfMlCz3aRH6o2CY2Fl/LnUd1PVq8=";
+      rev = "10b92330cf0ecaa39a52d3a8d190f7fb384b7b09";
+    };
+  }
+  {
+    name = "tree_sitter-0.22.4-150-g7e3f5726-z0LhyI7XuS7mSbx26jCz5VkJ_c1oL8vvC6WBgx0Idkpg";
+    path = fetchZigArtifact {
+      name = "tree_sitter";
+      url = "https://github.com/neurocyte/tree-sitter/releases/download/master-3cfb01c2f3349791a500f59bcc89b867d017d5b8/source.tar.gz";
+      hash = "sha256-2vIwHvTyXAjLT6qC1zrtCM1OjSJAta4z/2MkctSbl2g=";
+    };
+  }
+  {
+    name = "cbor-1.0.0-RcQE_AswAQAPlqBCZXYQf9DZXn-0Ubt8Mk03ZcJWcsAG";
+    path = fetchZigArtifact {
+      name = "cbor";
+      url = "git+https://github.com/neurocyte/cbor?ref=master#7d2eeb68c8a2fb3f4d6baad6cc04c521b92974c0";
+      hash = "sha256-EWOz+BPxRB5NxmqNzrJcdcaoGH6PdgeU4KI9IjJqar8=";
+      rev = "7d2eeb68c8a2fb3f4d6baad6cc04c521b92974c0";
+    };
+  }
+  {
+    name = "flags-0.10.0-a_9h3gB4AADAYn0XaZuUqH1jKRmy6dqvAIbomtTIF6V1";
+    path = fetchZigArtifact {
+      name = "flags";
+      url = "git+https://github.com/neurocyte/flags?ref=main#984b27948da3e4e40a253f76c85b51ec1a9ada11";
+      hash = "sha256-PnR8RI1Rp1FxtjzBYcLCWi6zXykSsHVYnNkmI2XVxh4=";
+      rev = "984b27948da3e4e40a253f76c85b51ec1a9ada11";
+    };
+  }
+  {
+    name = "dizzy-1.0.0-q40X4YCRAAAGYO9QOZiYYSOwiiFlqZlecMuQcxPiBcXM";
+    path = fetchZigArtifact {
+      name = "dizzy";
+      url = "https://github.com/neurocyte/dizzy/archive/c9219d23daccd9aa226cfde754fea278cb516459.tar.gz";
+      hash = "sha256-lFtDVVlIYt/5lCCTTOEfEFd8w1osV8JSvreMmK3YtIc=";
+    };
+  }
+  {
+    name = "libfuzzer_kit-0.0.0-i7XWVl2PBwC3r18KoW8xTU05KyWEMj6RfBpAXd3CQqt7";
+    path = fetchZigArtifact {
+      name = "libfuzzer_kit";
+      url = "git+https://github.com/SuperAuguste/zig-libfuzzer-kit.git#a27221dda33b232e65504766294ea4c7c079c3f0";
+      hash = "sha256-yxhiP2kJYli5VjF0uMJcDM0ByFIRmSxnwnMy0JwQxmU=";
+      rev = "a27221dda33b232e65504766294ea4c7c079c3f0";
+    };
+  }
+  {
+    name = "thespian-0.0.1-owFOjjMiBgCXFa9f0-RKTDgWwYzQp1Mnec_p6hsGXj_G";
+    path = fetchZigArtifact {
+      name = "thespian";
+      url = "git+https://github.com/neurocyte/thespian?ref=master#6eadc0fe29795f88752f3b6f296dc582b16cb5a1";
+      hash = "sha256-+Jlg6ai/C0/0/Ou4b/SErtQR8AkEylG0kNwA+qw9bDU=";
+      rev = "6eadc0fe29795f88752f3b6f296dc582b16cb5a1";
+    };
+  }
+  {
+    name = "asio-1.30.2-tLhDd0SB4QB1041_DEW_1cvEw8eMfBYLAwjN_G53Fn66";
+    path = fetchZigArtifact {
+      name = "asio";
+      url = "git+https://github.com/neurocyte/asio#0f1cbf24e5fb6fabe7078a20b76452f42e24a0df";
+      hash = "sha256-H3y7CTAlEpl0y3ERrNht8KabDRqvNDE+MzK4Uud2wAQ=";
+      rev = "0f1cbf24e5fb6fabe7078a20b76452f42e24a0df";
+    };
+  }
+  {
+    name = "zig_tracy-0.0.3-5-cp3Ht3AAAfHqShKfTK7waFK3Wjd3l2NheiqxvRRAdo";
+    path = fetchZigArtifact {
+      name = "tracy";
+      url = "git+https://github.com/neurocyte/zig-tracy#67070c146104d93fd3bed5091738f22e33e13bce";
+      hash = "sha256-YcSgPAQo/4+mrKkJS5UAn7z5xZjeb8kKIWrBK3yXhQ4=";
+      rev = "67070c146104d93fd3bed5091738f22e33e13bce";
+    };
+  }
+  {
+    name = "N-V-__8AAO2QjgFRswZWFwtGKFgOVx2Ysf5F18DVgbwtReiU";
+    path = fetchZigArtifact {
+      name = "tracy_src";
+      url = "https://github.com/neurocyte/tracy/archive/0ff0a1b324f497cf313a445637b7df25aabefb47.tar.gz";
+      hash = "sha256-dzMilJsOSdjNyvhyDb1v5dPWcR5uvhnQmsBynAJH74I=";
+    };
+  }
+  {
+    name = "N-V-__8AAKhUIwB6OywBocsytyvp6XiVu4fZwzFJHjumxGLY";
+    path = fetchZigArtifact {
+      name = "themes";
+      url = "https://github.com/neurocyte/flow-themes/releases/download/master-638f6f95c391420f0f140599ed5f87cc37834559/flow-themes.tar.gz";
+      hash = "sha256-CnG0htnCQBoyMGXGguyRUonbseBAgSKwWTm3pH6CXks=";
+    };
+  }
+  {
+    name = "fuzzig-0.1.1-Ji0xivxIAQBD0g8O_NV_0foqoPf3elsg9Sc3pNfdVH4D";
+    path = fetchZigArtifact {
+      name = "fuzzig";
+      url = "https://github.com/fjebaker/fuzzig/archive/4251fe4230d38e721514394a485db62ee1667ff3.tar.gz";
+      hash = "sha256-VBkKxu+JdPzYRvANLX4/o3Mgl3Ojt1so99D8VNrSbTA=";
+    };
+  }
+  {
+    name = "vaxis-0.5.1-BWNV_PIfCQBrMQyEAPPSOyupQYEud7vTs0jXEq5drkC9";
+    path = fetchZigArtifact {
+      name = "vaxis";
+      url = "git+https://github.com/neurocyte/libvaxis?ref=main#4debeaf0774a6db5de8bab212335fae795086035";
+      hash = "sha256-bfcOR5vzytKHbQHR6z71G+GE+iuEUuM23+38y6V+6Ss=";
+      rev = "4debeaf0774a6db5de8bab212335fae795086035";
+    };
+  }
+  {
+    name = "zigimg-0.1.0-8_eo2vHnEwCIVW34Q14Ec-xUlzIoVg86-7FU2ypPtxms";
+    path = fetchZigArtifact {
+      name = "zigimg";
+      url = "https://github.com/ivanstepanovftw/zigimg/archive/d7b7ab0ba0899643831ef042bd73289510b39906.tar.gz";
+      hash = "sha256-LB7Xa6KzVRRUSwwnyWM+y6fDG+kIDjfnoBDJO1obxVM=";
+    };
+  }
+  {
+    name = "zg-0.15.2-oGqU3AtAtAI7gs7zPvzg2_TlVIqi9wCNEw7DLvD5OvDN";
+    path = fetchZigArtifact {
+      name = "zg";
+      url = "git+https://codeberg.org/neurocyte/zg?ref=master#cdcab8b9ea3458efd710008055d993c5dbdb1af7";
+      hash = "sha256-dCaDTiZX62SZfJHMZn2IfwADbRegpNIM7u/dBPZ580k=";
+      rev = "cdcab8b9ea3458efd710008055d993c5dbdb1af7";
+    };
+  }
+  {
+    name = "zeit-0.6.0-5I6bk0J9AgCVa0nnyL0lNY9Xa9F68hHq-ZarhuXNV-Jb";
+    path = fetchZigArtifact {
+      name = "zeit";
+      url = "git+https://github.com/rockorager/zeit?ref=zig-0.15#ed2ca60db118414bda2b12df2039e33bad3b0b88";
+      hash = "sha256-IvXaqAzaWi3E1XBqQltCBFoRmXehZkVol3/RZwOsAKg=";
+      rev = "ed2ca60db118414bda2b12df2039e33bad3b0b88";
+    };
+  }
+  {
+    name = "zigwin32-25.0.28-preview-AAAAAICM5AMResOGQnQ85mfe60TTOQeMtt7GRATUOKoP";
+    path = fetchZigArtifact {
+      name = "win32";
+      url = "git+https://github.com/marlersoft/zigwin32?ref=main#5587b16fa040573846a6bf531301f6206d31a6bf";
+      hash = "sha256-GIH6aO8yEWKKvIr4syG6aYViXi2whIg4feWox7f9ZSM=";
+      rev = "5587b16fa040573846a6bf531301f6206d31a6bf";
+    };
+  }
+]
diff --git a/pkgs/flow-control/old/package.nix b/pkgs/flow-control/old/package.nix
new file mode 100755
index 0000000..159ad3f
--- /dev/null
+++ b/pkgs/flow-control/old/package.nix
@@ -0,0 +1,47 @@
+{
+  lib,
+  fetchFromGitHub,
+  stdenv,
+  zig_0_15,
+  callPackage,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "flow-control";
+  version = "0.6.0";
+
+  src = fetchFromGitHub {
+    owner = "neurocyte";
+    repo = "flow";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-868FK3wr/fjXzrQJ4YVDBvzNuX818lufEx/K0fvJdWo=";
+  };
+  postPatch = ''
+    ln -s ${
+      callPackage ./build.zig.zon.nix {
+        zig = zig_0_15;
+      }
+    } $ZIG_GLOBAL_CACHE_DIR/p
+  '';
+
+  nativeBuildInputs = [ zig_0_15 ];
+
+  passthru.updateScript = ./update.sh;
+
+  dontSetZigDefaultFlags = true;
+  zigBuildFlags = [
+    "-Dcpu=baseline"
+    "-Doptimize=ReleaseSafe"
+  ];
+
+  env.VERSION = finalAttrs.version;
+
+  meta = {
+    description = "Programmer's text editor";
+    homepage = "https://github.com/neurocyte/flow";
+    changelog = "https://github.com/neurocyte/flow/releases/tag/v${finalAttrs.version}";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ genga898 ];
+    mainProgram = "flow";
+  };
+})
diff --git a/pkgs/flow-control/old/update.sh b/pkgs/flow-control/old/update.sh
new file mode 100755
index 0000000..5a0f01c
--- /dev/null
+++ b/pkgs/flow-control/old/update.sh
@@ -0,0 +1,20 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p bash wget common-updater-scripts gnused
+
+latest_tag=$(list-git-tags --url=https://github.com/neurocyte/flow | sed 's/^v//' | tail -n 1)
+
+update-source-version flow-control "$latest_tag"
+
+mkdir -p src/syntax
+
+wget "https://raw.githubusercontent.com/neurocyte/flow/v${latest_tag}/build.zig.zon"
+wget -P src/syntax "https://raw.githubusercontent.com/neurocyte/flow/v${latest_tag}/src/syntax/build.zig.zon"
+
+nix --extra-experimental-features 'nix-command flakes' run github:Cloudef/zig2nix#zon2nix -- build.zig.zon
+mv build.zig.zon.nix pkgs/by-name/fl/flow-control/build.zig.zon.nix
+
+# strip file protocol
+sed -i '\|file = unpackZigArtifact { inherit name; artifact = /. + path; };|d' pkgs/by-name/fl/flow-control/build.zig.zon.nix
+nixfmt pkgs/by-name/fl/flow-control/build.zig.zon.nix
+
+rm -rf build.zig.zon build.zig.zon2json-lock src/