Reason: This version optionally need rust compiler, but doesn't build without some rust deps even when rust is not used.
Source: https://salsa.debian.org/python-team/packages/python-cryptography/-/blob/708682ad640c18f3bc7bae12937ef3540d172913/debian/patches/no-rust.patch

--- a/setup.py
+++ b/setup.py
@@ -5,28 +5,10 @@
 # for complete details.
 
 import os
-import platform
 import sys
 
 from setuptools import find_packages, setup
 
-try:
-    from setuptools_rust import RustExtension
-except ImportError:
-    print(
-        """
-        =============================DEBUG ASSISTANCE==========================
-        If you are seeing an error here please try the following to
-        successfully install cryptography:
-
-        Upgrade to the latest pip and try again. This will fix errors for most
-        users. See: https://pip.pypa.io/en/stable/installing/#upgrading-pip
-        =============================DEBUG ASSISTANCE==========================
-        """
-    )
-    raise
-
-
 base_dir = os.path.dirname(__file__)
 src_dir = os.path.join(base_dir, "src")
 
@@ -41,27 +23,8 @@
 
 # `install_requirements` and `setup_requirements` must be kept in sync with
 # `pyproject.toml`
-setuptools_rust = "setuptools-rust>=0.11.4"
 install_requirements = ["cffi>=1.12"]
-setup_requirements = install_requirements + [setuptools_rust]
-
-if os.environ.get("CRYPTOGRAPHY_DONT_BUILD_RUST"):
-    rust_extensions = []
-else:
-    rust_extensions = [
-        RustExtension(
-            "_rust",
-            "src/rust/Cargo.toml",
-            py_limited_api=True,
-            # Enable abi3 mode if we're not using PyPy.
-            features=(
-                []
-                if platform.python_implementation() == "PyPy"
-                else ["pyo3/abi3-py36"]
-            ),
-            rust_version=">=1.41.0",
-        )
-    ]
+setup_requirements = install_requirements
 
 with open(os.path.join(base_dir, "README.rst")) as f:
     long_description = f.read()
@@ -130,7 +93,6 @@
                 "sphinxcontrib-spelling >= 4.0.1",
             ],
             "sdist": [
-                setuptools_rust,
             ],
             "pep8test": [
                 "black",
@@ -148,8 +110,7 @@
         cffi_modules=[
             "src/_cffi_src/build_openssl.py:ffi",
             "src/_cffi_src/build_padding.py:ffi",
-        ],
-        rust_extensions=rust_extensions,
+        ]
     )
 except:  # noqa: E722
     # Note: This is a bare exception that re-raises so that we don't interfere