--- a/winbuild.py	2018-11-12 19:41:32.646746053 +0530
+++ b/winbuild.py	2018-11-12 19:42:28.186745866 +0530
@@ -337,7 +337,7 @@ class OpensslBuilder(Builder):
 
     @property
     def dll_paths(self):
-        raise NotImplemented
+        raise NotImplementedError
 
     @property
     def include_path(self):
@@ -371,7 +371,7 @@ class CaresBuilder(Builder):
 
     @property
     def dll_paths(self):
-        raise NotImplemented
+        raise NotImplementedError
 
     @property
     def include_path(self):
@@ -431,7 +431,7 @@ BUILD_STATIC_LIB=1
 
     @property
     def dll_paths(self):
-        raise NotImplemented
+        raise NotImplementedError
 
     @property
     def include_path(self):