1 files changed, 7 insertions, 11 deletions
diff --git a/setup.py b/setup.py
index 79f8f4e..572f2ac 100644
--- a/setup.py
+++ b/setup.py
@@ -1388,17 +1388,13 @@ class PyBuildExt(build_ext):
 
     def detect_multiprocessing(self):
         # Richard Oudkerk's multiprocessing module
-        if MS_WINDOWS:
-            multiprocessing_srcs = ['_multiprocessing/multiprocessing.c',
-                                    '_multiprocessing/semaphore.c']
-        else:
-            multiprocessing_srcs = ['_multiprocessing/multiprocessing.c']
-            if (sysconfig.get_config_var('HAVE_SEM_OPEN') and not
-                sysconfig.get_config_var('POSIX_SEMAPHORES_NOT_ENABLED')):
-                multiprocessing_srcs.append('_multiprocessing/semaphore.c')
-        self.add(Extension('_multiprocessing', multiprocessing_srcs,
-                           include_dirs=["Modules/_multiprocessing"]))
-
+        multiprocessing_srcs = ['_multiprocessing/multiprocessing.c']
+        if (
+            sysconfig.get_config_var('HAVE_SEM_OPEN') and not
+            sysconfig.get_config_var('POSIX_SEMAPHORES_NOT_ENABLED')
+        ):
+            multiprocessing_srcs.append('_multiprocessing/semaphore.c')
+        self.addext(Extension('_multiprocessing', multiprocessing_srcs))
         self.addext(Extension('_posixshmem', ['_multiprocessing/posixshmem.c']))
 
     def detect_uuid(self):