Problems with buildbot shell command : Adding single quotes to last argc argument - buildbot

Question

I am running buildbot v0.8.9 and encountering a really weird problem.
I try to change the access permissions of exe files and runs into troubles.
Here is the code I first wrote :
ShellCommand(command=["chmod", "u+rwx , "*.exe"],workdir="myWorkDir",descriptionDone=["Changing permission access"])
This result in :
chmod u+rwx '*.exe'
After I read that article which seemed to be what I wanted, but after following it and doing :
ShellCommand(command=["sh", "chmod u+rwx *.exe"],workdir="myWorkDir",descriptionDone=["Changing permission access"])
I got this :
sh 'chmod u+rwx *.exe'
So the problem of the last argument single quoted is still there.

Answer 1

I finally found the response, reading the article I linked again since I had to do something else kind of related to that issue :
I wanted to use the "-c" argument, and I was missing it on my 2nd attempt.
So here is the correct code :
ShellCommand(command=["sh", "-c", "chmod u+rwx *.exe"],workdir="myWorkDir",descriptionDone=["Changing permission access"])