Minor adjustments in apply_pyproject.tomldev/egg_info_requires

1 files changed, 3 insertions, 3 deletions

diff --git a/setuptools/config/_apply_pyprojecttoml.py b/setuptools/config/_apply_pyprojecttoml.py
index 3091e3b5..cdd65c82 100644
--- a/setuptools/config/_apply_pyprojecttoml.py
+++ b/setuptools/config/_apply_pyprojecttoml.py
@@ -205,7 +205,7 @@ def _dependencies(dist: "Distribution", val: list, _root_dir):
 
 
 def _optional_dependencies(dist: "Distribution", val: dict, _root_dir):
-    existing = getattr(dist, "extras_require", {})
+    existing = getattr(dist, "extras_require", None) or {}
     _set_config(dist, "extras_require", {**existing, **val})
 
 
@@ -353,8 +353,8 @@ _PREVIOUSLY_DEFINED = {
     "classifiers": _attrgetter("metadata.classifiers"),
     "urls": _attrgetter("metadata.project_urls"),
     "entry-points": _get_previous_entrypoints,
-    "dependencies": _some_attrgetter("_orig_install_requires", "install_requires"),
-    "optional-dependencies": _some_attrgetter("_orig_extras_require", "extras_require"),
+    "dependencies": _attrgetter("install_requires"),
+    "optional-dependencies": _attrgetter("extras_require"),
 }