diff -r 089573725c77 Lib/subprocess.py
--- a/Lib/subprocess.py	Wed Nov 05 22:17:29 2014 +0100
+++ b/Lib/subprocess.py	Wed Nov 05 17:11:47 2014 -0600
@@ -1344,7 +1344,8 @@
                 args = list(args)
 
             if shell:
-                args = ["/bin/sh", "-c"] + args
+                shell_executable_name = os.get_shell_executable()
+                args = [shell_executable_name, "-c"] + args
                 if executable:
                     args[0] = executable