I created a plist file and when I built my project I received the following error:
Google turned up no helpful information about the source of the problem. The most obvious workaround I could think of was to simply make a symlink in /Developer/usr/bin to /usr/bin/plutil.
CopyPlistFile build/Debug-iphonesimulator/TestApp.app/TestArray.plist TestArray.plist cd /Users/arockwell/dev/TestApp setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin" /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist --convert binary1 TestArray.plist --outdir /Users/arockwell/dev/DrinkMixer/build/Debug-iphonesimulator/TestApp.app sh: plutil: command not found Command /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist failed with exit code 127
I wish I understood the root cause of the problem, but that seemed to do the trick.
ln -s /usr/bin/plutil /Developer/usr/bin/