Fix extension building script

Author: sdispater

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Change Log
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed extension building script.
+
+
 ## [1.4.3] - 2018-03-20
 
 ### Fixed

build.py

@@ -38,14 +38,14 @@ def run(self):
         try:
             build_ext.run(self)
         except (DistutilsPlatformError, FileNotFoundError):
-            raise BuildFailed()
+           pass
 
     def build_extension(self, ext):
         try:
             build_ext.build_extension(self, ext)
         except (CCompilerError, DistutilsExecError,
                 DistutilsPlatformError, ValueError):
-            raise BuildFailed()
+            pass
 
 
 def build(setup_kwargs):