diff --git a/.github/workflows/python-dev.yml b/.github/workflows/python-dev.yml
index 46cb564b494f6..8b97c3821efe5 100644
--- a/.github/workflows/python-dev.yml
+++ b/.github/workflows/python-dev.yml
@@ -80,9 +80,10 @@ jobs:
         python -m pip install python-dateutil pytz cython hypothesis==6.52.1 pytest>=6.2.5 pytest-xdist pytest-cov pytest-asyncio>=0.17
         python -m pip list
 
+    # GH 47305: Parallel build can cause flaky ImportError from pandas/_libs/tslibs
     - name: Build Pandas
       run: |
-        python setup.py build_ext -q -j2
+        python setup.py build_ext -q -j1
         python -m pip install -e . --no-build-isolation --no-use-pep517
 
     - name: Build Version