From 2977d5068b878ae0357ec8471e73b126aefdcd00 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Tue, 8 Mar 2022 00:51:30 -0800
Subject: [PATCH 1/2] Use tomllib on Python 3.11

---
 docs/installation.rst |  4 ++--
 setup.cfg             |  2 +-
 src/build/__init__.py | 15 +++++++++------
 3 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/docs/installation.rst b/docs/installation.rst
index e098c61a..563ff576 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -37,8 +37,8 @@ This package can build itself with only the ``toml`` and ``pep517``
 dependencies. The ``--skip-dependency-check`` flag should be used in this
 case.
 
-We have a dependency on tomli_, but toml_ can be used instead, which may make
-bootstrapping easier.
+On Python 3.10 and older, we have a dependency on tomli_, but toml_ can be
+used instead, which may make bootstrapping easier.
 
 
 Compatibility
diff --git a/setup.cfg b/setup.cfg
index 16d08d04..0c610723 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,9 +28,9 @@ packages = find:
 install_requires =
     packaging>=19.0
     pep517>=0.9.1
-    tomli>=1.0.0 # toml can be used instead -- in case it makes bootstrapping easier
     colorama;os_name == "nt" # not actually a runtime dependency, only supplied as there is not "recommended dependency" support
     importlib-metadata>=0.22;python_version < "3.8"
+    tomli>=1.0.0;python_version < "3.11" # toml can be used instead -- in case it makes bootstrapping easier
 python_requires = >=3.6
 package_dir =
     =src
diff --git a/src/build/__init__.py b/src/build/__init__.py
index a1117df9..a5b789cc 100644
--- a/src/build/__init__.py
+++ b/src/build/__init__.py
@@ -40,13 +40,16 @@
 TOMLDecodeError: Type[Exception]
 toml_loads: Callable[[str], MutableMapping[str, Any]]
 
-
 try:
-    from tomli import TOMLDecodeError
-    from tomli import loads as toml_loads
-except ModuleNotFoundError:  # pragma: no cover
-    from toml import TomlDecodeError as TOMLDecodeError  # type: ignore
-    from toml import loads as toml_loads  # type: ignore
+    from tomllib import TOMLDecodeError  # type: ignore
+    from tomllib import loads as toml_loads  # type: ignore
+except ModuleNotFoundError:
+    try:
+        from tomli import TOMLDecodeError
+        from tomli import loads as toml_loads
+    except ModuleNotFoundError:  # pragma: no cover
+        from toml import TomlDecodeError as TOMLDecodeError  # type: ignore
+        from toml import loads as toml_loads  # type: ignore
 
 
 RunnerType = Callable[[Sequence[str], Optional[str], Optional[Mapping[str, str]]], None]

From 0623ad1989071e0c1fb3b825fc2e86418f2475d5 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Tue, 8 Mar 2022 13:18:49 -0800
Subject: [PATCH 2/2] use sys.version check

---
 src/build/__init__.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/build/__init__.py b/src/build/__init__.py
index a5b789cc..f061c20c 100644
--- a/src/build/__init__.py
+++ b/src/build/__init__.py
@@ -40,10 +40,10 @@
 TOMLDecodeError: Type[Exception]
 toml_loads: Callable[[str], MutableMapping[str, Any]]
 
-try:
-    from tomllib import TOMLDecodeError  # type: ignore
-    from tomllib import loads as toml_loads  # type: ignore
-except ModuleNotFoundError:
+if sys.version_info >= (3, 11):
+    from tomllib import TOMLDecodeError
+    from tomllib import loads as toml_loads
+else:
     try:
         from tomli import TOMLDecodeError
         from tomli import loads as toml_loads