diff --git a/pyproject.toml b/pyproject.toml
index 8623e408b..eb3d6c676 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ requires = [
 ]
 build-backend = "setuptools.build_meta"
 
-[tools.setuptools_scm]
+[tool.setuptools_scm]
 # It would be nice to include the commit hash in the version, but that
 # can't be done in a PEP 440-compatible way.
 version_scheme = "no-guess-dev"
diff --git a/tools/ci/cibuildwheel.py b/tools/ci/cibuildwheel.py
index f9f80f200..3ac1c36b5 100755
--- a/tools/ci/cibuildwheel.py
+++ b/tools/ci/cibuildwheel.py
@@ -96,8 +96,7 @@ def run(args, extra_args):
 
   env["CIBW_ARCHS_MACOS"] = "x86_64 arm64"
   env["CIBW_SKIP"] = (
-      "cp27-* cp35-* cp36-* cp37-* cp38-* cp39-* pp* *_i686 *-win32"
-      " *-musllinux*"
+      "cp36-* cp37-* cp38-* cp39-* pp* *_i686 *-win32 *-musllinux*"
   )
   env["CIBW_TEST_COMMAND"] = (
       "python -m pytest {project}/python/tensorstore/tests -vv -s"