diff --git a/pyproject.toml b/pyproject.toml
index a255e99..a5dd40e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,8 @@ backends = [
   "maturin",
   "meson-python @ git+https://github.com/mgorny/meson-python@freethreading-limited-api",
   "scikit-build-core",
-  "setuptools",
+  "setuptools @ git+https://github.com/ngoldbaum/setuptools@abi3.abi3t",
+  "packaging @ git+https://github.com/ngoldbaum/packaging@abi3.abi3t",
 ]
 build-tools = [
   "cython @ git+https://github.com/cython/cython@freethreading-limited-api-preview",
diff --git a/setuptools/c/pyproject.toml b/setuptools/c/pyproject.toml
index 483b008..56a97ec 100644
--- a/setuptools/c/pyproject.toml
+++ b/setuptools/c/pyproject.toml
@@ -1,6 +1,9 @@
 [build-system]
 build-backend = "setuptools.build_meta"
-requires = ["setuptools"]
+requires = [
+  "setuptools@git+https://github.com/ngoldbaum/setuptools@abi3.abi3t",
+  "packaging@git+https://github.com/ngoldbaum/packaging@abi3.abi3t",
+]
 
 [project]
 name = "limited-api"
diff --git a/setuptools/c/setup.cfg b/setuptools/c/setup.cfg
new file mode 100644
index 0000000..121002e
--- /dev/null
+++ b/setuptools/c/setup.cfg
@@ -0,0 +1,2 @@
+[bdist_wheel]
+py_limited_api = cp315
diff --git a/setuptools/cython/pyproject.toml b/setuptools/cython/pyproject.toml
index b146ea9..8233faf 100644
--- a/setuptools/cython/pyproject.toml
+++ b/setuptools/cython/pyproject.toml
@@ -1,7 +1,8 @@
 [build-system]
 build-backend = "setuptools.build_meta"
 requires = [
-  "setuptools",
+  "setuptools@git+https://github.com/ngoldbaum/setuptools@abi3.abi3t",
+  "packaging@git+https://github.com/ngoldbaum/packaging@abi3.abi3t",
   "cython@git+https://github.com/cython/cython@freethreading-limited-api-preview",
 ]
 
diff --git a/setuptools/cython/setup.cfg b/setuptools/cython/setup.cfg
new file mode 100644
index 0000000..121002e
--- /dev/null
+++ b/setuptools/cython/setup.cfg
@@ -0,0 +1,2 @@
+[bdist_wheel]
+py_limited_api = cp315
diff --git a/tests/test_wheel.py b/tests/test_wheel.py
index 0c8a3e1..3f2e6d4 100644
--- a/tests/test_wheel.py
+++ b/tests/test_wheel.py
@@ -74,13 +74,21 @@ def test_install(test_case: str, tmp_path: Path, subtests) -> None:
         reason="pyo3 does not support 3.15 (or PEP 803) yet",
     ):
         dist_path = builder.build("wheel", tmp_path)
+        path_name = Path(dist_path).name
 
-    with subtests.test(msg="wheel has 'abi3.abi3t' tag"):
-        with subxfail(
-            build_system != "meson-python",
-            reason="Only meson-python fork builds abi3.abi3t",
-        ):
-            assert "abi3.abi3t" in Path(dist_path).name
+
+    with subtests.test(msg="wheel has correct ABI tag"):
+        if build_system == "setuptools":
+            # The setuptools fork doesn't yet have support for forcing a GIL-enabled build
+            # to produce an abi3.abi3t wheel
+            if IS_FREETHREADING:
+                assert "abi3.abi3t" in path_name
+            else:
+                assert "abi3" in path_name and "abi3t" not in path_name
+        else:
+            with subxfail(build_system != "meson-python",
+                          reason="Only meson-python and setuptools forks build abi3.abi3t"):
+                assert "abi3.abi3t" in path_name
 
     subprocess.run([sys.executable, "-m", "venv", tmp_path / "venv"], check=True)
     python_exe = "python.exe" if os.name == "nt" else "python"
@@ -108,7 +116,7 @@ def test_install(test_case: str, tmp_path: Path, subtests) -> None:
             ):
                 subprocess.run([venv_python, "-c", TEST_ABI3], check=True)
 
-    if "abi3t" not in Path(dist_path).name:
+    if "abi3t" not in path_name:
         return
     # if we're testing with non-freethreading pythonX.Y, try pythonX.Yt
     # otherwise, try pythonX.Y (presumably non-freethreading)