--- a/bindings/python/capstone/__init__.py
+++ b/bindings/python/capstone/__init__.py
@@ -364,7 +364,7 @@
 if sys.platform == 'darwin':
     _lib = "libcapstone.dylib"
 elif sys.platform in ('win32', 'cygwin'):
-    _lib = "capstone.dll"
+    _lib = "libcapstone.dll"
 else:
     _lib = "libcapstone.so"
 
--- a/bindings/python/setup.py
+++ b/bindings/python/setup.py
@@ -63,8 +63,8 @@
     VERSIONED_LIBRARY_FILE = "libcapstone.{PKG_MAJOR}.dylib".format(**VERSION_DATA)
     LIBRARY_FILE = "libcapstone.dylib"
 elif SYSTEM in ('win32', 'cygwin'):
-    VERSIONED_LIBRARY_FILE = "capstone.dll"
-    LIBRARY_FILE = "capstone.dll"
+    VERSIONED_LIBRARY_FILE = "libcapstone.dll"
+    LIBRARY_FILE = "libcapstone.dll"
 else:
     VERSIONED_LIBRARY_FILE = "libcapstone.so.{PKG_MAJOR}".format(**VERSION_DATA)
     LIBRARY_FILE = "libcapstone.so"
@@ -161,7 +161,10 @@
 class custom_build(build):
     def run(self):
         if 'LIBCAPSTONE_PATH' in os.environ:
-            logger.info('Skipping building C extensions since LIBCAPSTONE_PATH is set')
+            logger.info('Copying existing libcapstone to Python lib directory')
+            clean_bins()
+            os.mkdir(LIBS_DIR)
+            shutil.copy(os.environ['LIBCAPSTONE_PATH'], LIBS_DIR)
         else:
             logger.info('Building C extensions')
             build_libraries()