diff --git a/tools/pythonpkg/setup.py b/tools/pythonpkg/setup.py
index 30f1e1ccdd..6784169fcb 100644
--- a/tools/pythonpkg/setup.py
+++ b/tools/pythonpkg/setup.py
@@ -96,7 +96,7 @@ def parallel_cpp_compile(
             return
         self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
 
-    list(multiprocessing.pool.ThreadPool(multiprocessing.cpu_count()).imap(_single_compile, objects))
+    list(multiprocessing.pool.ThreadPool(@NIX_BUILD_CORES@).imap(_single_compile, objects))
     return objects
 
 
@@ -163,7 +163,6 @@ if 'BUILD_HTTPFS' in os.environ:
 for ext in extensions:
     toolchain_args.extend(['-DDUCKDB_EXTENSION_{}_LINKED'.format(ext.upper())])
 
-toolchain_args.extend(['-DDUCKDB_EXTENSION_AUTOLOAD_DEFAULT=1', '-DDUCKDB_EXTENSION_AUTOINSTALL_DEFAULT=1'])
 
 
 class get_pybind_include(object):
@@ -348,7 +347,7 @@ setup(
     packages=packages,
     include_package_data=True,
     python_requires='>=3.7.0',
-    setup_requires=setup_requires + ["setuptools_scm<7.0.0", 'pybind11>=2.6.0'],
+    setup_requires=setup_requires + ["setuptools_scm", 'pybind11>=2.6.0'],
     use_scm_version=setuptools_scm_conf,
     tests_require=['google-cloud-storage', 'mypy', 'pytest'],
     classifiers=[