title: iOS build failure; /bin/sh No such file or directory
body: <p>I was working on my application and then out of no where, I get this build error and can't figure out why it won't go away. Obviously it thinks I am missing a script of some sort. Anybody else know why? I am using Xcode 4.5.1.</p>
  
  <blockquote>
    <p>/bin/sh:
    /Users/JonErickson/Library/Developer/Xcode/DerivedData/FireCom-cygbnsedlgybvdewalvvmzqeehlc/Build/Intermediates/FireCom.build/Debug-iphonesimulator/FireCom.build/Script-C8CC6BE415FAAB4C001BB67E.sh:
    (null): bad interpreter: No such file or directory</p>
  </blockquote>