diff --git a/.gitignore b/.gitignore
index 923875d32..81bb820ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .venv
+*.egg-info/
 __pycache__
 /build
 /dist
diff --git a/pyproject.toml b/pyproject.toml
index bd2409f6e..4f08690d2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "temporalio"
-version = "1.26.0"
+version = "1.26.0.post0"
 description = "Temporal.io Python SDK"
 authors = [{ name = "Temporal Technologies Inc", email = "sdk@temporal.io" }]
 requires-python = ">=3.10"
@@ -16,7 +16,6 @@ dependencies = [
   "typing-extensions>=4.2.0,<5",
 ]
 classifiers = [
-  "License :: OSI Approved :: MIT License",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
@@ -44,10 +43,10 @@ aioboto3 = [
 ]
 
 [project.urls]
-Homepage = "https://github.com/temporalio/sdk-python"
-Repository = "https://github.com/temporalio/sdk-python"
+Homepage = "https://github.com/lyft/sdk-python"
+Repository = "https://github.com/lyft/sdk-python"
 Documentation = "https://docs.temporal.io/docs/python"
-"Bug Tracker" = "https://github.com/temporalio/sdk-python/issues"
+"Bug Tracker" = "https://github.com/lyft/sdk-python/issues"
 
 [dependency-groups]
 dev = [
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 000000000..24cee0769
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,16 @@
+[metadata]
+name = temporalio
+version = 1.26.0.post0
+description = Temporal.io Python SDK
+long_description = file: README.md
+long_description_content_type = text/markdown
+license_files = LICENSE
+url = https://github.com/lyft/sdk-python
+project_urls =
+    Homepage = https://github.com/lyft/sdk-python
+    Documentation = https://docs.temporal.io/docs/python
+    Repository = https://github.com/lyft/sdk-python
+    Bug Tracker = https://github.com/lyft/sdk-python/issues
+
+[options]
+python_requires = >=3.10
diff --git a/setup.py b/setup.py
new file mode 100644
index 000000000..33e8eaea6
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,112 @@
+"""Setuptools entry points for environments that invoke ``setup.py`` directly.
+
+The canonical build definition remains ``pyproject.toml`` / ``maturin``. This
+module delegates ``sdist`` and ``bdist_wheel`` to ``python -m maturin`` so
+legacy ``python setup.py sdist`` / ``bdist_wheel`` workflows produce the same
+artifacts as a PEP 517 build.
+
+Bootstrap tradeoff: if ``maturin`` is not importable as a module, this script
+installs ``maturin`` into the *current* interpreter with ``pip`` (requires
+network on cold builders). Builders that pre-install ``maturin`` avoid that
+step. Alternatives such as ``setup_requires`` are avoided because they interact
+poorly with modern pip and isolated metadata resolution.
+
+``maturin sdist`` / ``maturin build`` still invoke Cargo metadata and require a
+Rust toolchain (``cargo`` on ``PATH``), same as a normal PEP 517 build.
+"""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+from setuptools import setup
+from setuptools.command.bdist_wheel import bdist_wheel as _bdist_wheel
+from setuptools.command.sdist import sdist as _sdist
+
+ROOT = Path(__file__).resolve().parent
+DIST_DIR = "dist"
+MATURIN_REQ = "maturin>=1.0,<2.0"
+
+
+def _output_dir(cmd: object) -> str:
+    """Directory for artifacts; honors setuptools ``--dist-dir`` / ``-d`` when set."""
+    dist_dir = getattr(cmd, "dist_dir", None)
+    if dist_dir:
+        return str(dist_dir)
+    return DIST_DIR
+
+
+def _have_maturin() -> bool:
+    exe = shutil.which("maturin")
+    if exe:
+        return True
+    try:
+        subprocess.run(
+            [sys.executable, "-m", "maturin", "--version"],
+            check=True,
+            capture_output=True,
+            cwd=ROOT,
+        )
+        return True
+    except (subprocess.CalledProcessError, OSError):
+        return False
+
+
+def _ensure_maturin() -> None:
+    if _have_maturin():
+        return
+    subprocess.check_call(
+        [
+            sys.executable,
+            "-m",
+            "pip",
+            "install",
+            MATURIN_REQ,
+        ],
+        cwd=ROOT,
+    )
+
+
+def _maturin_cmd() -> list[str]:
+    _ensure_maturin()
+    if shutil.which("maturin"):
+        return ["maturin"]
+    return [sys.executable, "-m", "maturin"]
+
+
+def _run_maturin(args: list[str]) -> None:
+    cmd = _maturin_cmd() + args
+    sys.stderr.write("Running: " + " ".join(cmd) + "\n")
+    subprocess.check_call(cmd, cwd=ROOT)
+
+
+class sdist(_sdist):
+    def run(self) -> None:
+        out = _output_dir(self)
+        self.mkpath(out)
+        _run_maturin(["sdist", "-o", out])
+
+
+class bdist_wheel(_bdist_wheel):
+    def run(self) -> None:
+        out = _output_dir(self)
+        self.mkpath(out)
+        _run_maturin(
+            [
+                "build",
+                "--release",
+                "-o",
+                out,
+            ]
+        )
+
+
+setup(
+    cmdclass={
+        "sdist": sdist,
+        "bdist_wheel": bdist_wheel,
+    },
+)