See https://github.com/google/or-tools/issues/2305

--- ortools/python/setup.py.in.orig	2020-12-30 17:40:00 UTC
+++ ortools/python/setup.py.in
@@ -42,8 +42,8 @@ setup(
     version='@PROJECT_VERSION@',
     packages=find_packages(),
     install_requires=[
-        'protobuf >= 3.14.0',
-        'absl-py >= 0.11',
+        #'protobuf >= 3.14.0',
+        #'absl-py >= 0.11',
     ],
     package_data={
         '@PROJECT_NAME@':[$<$<NOT:$<PLATFORM_ID:Windows>>:'.libs/*', '../$<TARGET_SONAME_FILE_NAME:ortools>'>],