diff --git a/guix/build-system/python.scm b/guix/build-system/python.scm
index b753940bad..e39c06528e 100644
--- a/guix/build-system/python.scm
+++ b/guix/build-system/python.scm
@@ -50,7 +50,7 @@
   "Return a URI string for the Python package hosted on the Python Package
 Index (PyPI) corresponding to NAME and VERSION.  EXTENSION is the file name
 extension, such as '.tar.gz'."
-  (string-append "https://pypi.org/packages/source/"
+  (string-append "https://files.pythonhosted.org/packages/source/"
                  (string-take name 1) "/" name "/"
                  name "-" version extension))