diff --git a/cpython-windows/build.py b/cpython-windows/build.py
index 4da24476..e981a8ac 100644
--- a/cpython-windows/build.py
+++ b/cpython-windows/build.py
@@ -1002,9 +1002,11 @@ def collect_python_build_artifacts(
     depends_projects |= {
         "liblzma",
         "sqlite3",
-        "zlib-ng",
     }
 
+    if zlib_entry == "zlib-ng":
+        depends_projects |= {"zlib-ng"}
+
     known_projects = (
         ignore_projects | other_projects | depends_projects | extension_projects
     )