diff --git a/pkgs/applications/misc/smb3-foundry/default.nix b/pkgs/applications/misc/smb3-foundry/default.nix
new file mode 100644
index 00000000000..81e54007b8b
--- /dev/null
+++ b/pkgs/applications/misc/smb3-foundry/default.nix
@@ -0,0 +1,52 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, python3
+, makeWrapper
+}:
+
+let
+  pythonEnv = (python3.withPackages (ps: with ps; [
+    pyside6
+    py65
+    qdarkstyle
+  ]));
+in
+stdenv.mkDerivation (finalAttrs: {
+  pname = "smb3-foundry";
+  version = "1.2";
+
+  src = fetchFromGitHub {
+    owner = "mchlnix";
+    repo = "SMB3-Foundry";
+    rev = "refs/tags/${finalAttrs.version}";
+    hash = "sha256-iqqIyGp/sqWgShxk52omVcn7Q3WL2hK8sTLH4dashLE=";
+  };
+
+  patches = [ ./fix-relative-dirs.patch ];
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/app
+    cp -R smb3parse foundry scribe data doc VERSION smb3-foundry.py smb3-scribe.py $out/app
+
+    makeWrapper ${pythonEnv}/bin/python $out/bin/smb3-foundry \
+          --add-flags "$out/app/smb3-foundry.py"
+    makeWrapper ${pythonEnv}/bin/python $out/bin/smb3-scribe \
+          --add-flags "$out/app/smb3-scribe.py"
+
+    runHook postInstall
+  '';
+
+  meta = {
+    homepage = "https://github.com/mchlnix/SMB3-Foundry";
+    description = "A modern Super Mario Bros. 3 Level Editor";
+    changelog = "https://github.com/mchlnix/SMB3-Foundry/releases/tag/${finalAttrs.version}";
+    license = lib.licenses.gpl3Only;
+    platforms = lib.platforms.unix;
+    maintainers = with lib.maintainers; [ tomasajt ];
+  };
+})
diff --git a/pkgs/applications/misc/smb3-foundry/fix-relative-dirs.patch b/pkgs/applications/misc/smb3-foundry/fix-relative-dirs.patch
new file mode 100644
index 00000000000..d49ddde897b
--- /dev/null
+++ b/pkgs/applications/misc/smb3-foundry/fix-relative-dirs.patch
@@ -0,0 +1,34 @@
+diff --git a/foundry/gui/WarningList.py b/foundry/gui/WarningList.py
+index ace83d7..46012df 100644
+--- a/foundry/gui/WarningList.py
++++ b/foundry/gui/WarningList.py
+@@ -5,6 +5,7 @@ from PySide6.QtCore import QEvent, QRect, Qt, Signal, SignalInstance
+ from PySide6.QtGui import QCursor, QFocusEvent
+ from PySide6.QtWidgets import QLabel, QVBoxLayout, QWidget
+ 
++from foundry import root_dir
+ from foundry.game import GROUND
+ from foundry.game.ObjectDefinitions import GeneratorType
+ from foundry.game.gfx.objects import EnemyItem
+@@ -216,7 +217,7 @@ class WarningList(QWidget):
+         return [enemy for enemy in self.level_ref.level.enemies if enemy.type == enemy_id]
+ 
+     def _build_enemy_clan_dict(self):
+-        with open("data/enemy_data.json", "r") as enemy_data_file:
++        with open(root_dir.joinpath("data", "enemy_data.json"), "r") as enemy_data_file:
+             enemy_data = json.loads(enemy_data_file.read())
+ 
+             self._enemy_dict.clear()
+diff --git a/smb3parse/util/parser/__init__.py b/smb3parse/util/parser/__init__.py
+index ecef169..8bba57e 100644
+--- a/smb3parse/util/parser/__init__.py
++++ b/smb3parse/util/parser/__init__.py
+@@ -302,7 +302,7 @@ def gen_levels_in_rom(
+ 
+     print("---------------------", level_count, "------------------------")
+ 
+-    level_data = pathlib.Path("data/levels.dat")
++    level_data = pathlib.Path(__file__).parent.parent.parent.joinpath("data", "levels.dat")
+ 
+     missing = 0
+     levels: dict[int, set[int]] = defaultdict(set)
diff --git a/pkgs/development/python-modules/py65/default.nix b/pkgs/development/python-modules/py65/default.nix
index b0b93b50995..5748b8c1693 100644
--- a/pkgs/development/python-modules/py65/default.nix
+++ b/pkgs/development/python-modules/py65/default.nix
@@ -24,7 +24,7 @@ buildPythonPackage rec {
           --replace "test_argv_combination_rom_mpu" "dont_test_argv_combination_rom_mpu"
   '';
 
-  meta = with lib; {
+  meta = {
     homepage = "https://py65.readthedocs.io/";
     description = "Emulate 6502-based microcomputer systems in Python";
     longDescription = ''
@@ -33,7 +33,7 @@ buildPythonPackage rec {
       debugger. Py65Mon provides a command line with many convenient commands
       for interacting with the simulated 6502-based system.
     '';
-    license = licenses.bsd3;
-    maintainers = with maintainers; [ AndersonTorres tomasajt ];
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ AndersonTorres tomasajt ];
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ada043f0894..cf4fcc34474 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1829,6 +1829,8 @@ with pkgs;
 
   sorted-grep = callPackage ../tools/text/sorted-grep { };
 
+  smb3-foundry = callPackage ../applications/misc/smb3-foundry { };
+
   smbmap = callPackage ../tools/security/smbmap { };
 
   smbscan = callPackage ../tools/security/smbscan { };