diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 97bcf2f..dcab8c7 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -40,7 +40,9 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Build sdist
-        run: pipx run build --sdist
+        run: |
+          pipx install cython
+          pipx run build --sdist
 
       - uses: actions/upload-artifact@v4
         with:
diff --git a/build.py b/build.py
index 9c6bb28..4261bba 100644
--- a/build.py
+++ b/build.py
@@ -5,15 +5,7 @@
 from pathlib import Path
 
 from setuptools import Distribution
-
-try:
-    from Cython.Build import cythonize
-    from Cython.Distutils import build_ext
-except ImportError:
-    print(
-        "Cython is required to build the Cython modules. "
-        "Please install Cython first by running: pip install Cython"
-    )
+from Cython.Build import cythonize
 
 # import Cython.Compiler.Options
 # Cython.Compiler.Options.cimport_from_pyx = True