Remove reference to nonexistent _unlock_builddir() method in
EbuildPhase._env_extractor_exit().
diff --git a/pym/_emerge/EbuildPhase.py b/pym/_emerge/EbuildPhase.py
index 58ce0c6..e85fe9c 100644
--- a/pym/_emerge/EbuildPhase.py
+++ b/pym/_emerge/EbuildPhase.py
@@ -40,7 +40,6 @@
 
 	def _env_extractor_exit(self, env_extractor):
 		if self._default_exit(env_extractor) != os.EX_OK:
-			self._unlock_builddir()
 			self.wait()
 			return