You are missing dependencies. The long story short version, is you need to first get and make dtrace-tools:
$ curl http://opensource.apple.com/tarballs/dtrace/dtrace-96.tar.gz > dt.tar.gz
$ tar zxvf dt.tar.gz
$ cd dtrace-96
$ mkdir -p obj sym dst
$ xcodebuild install -target ctfconvert -target ctfdump -target ctfmerge \
ARCHS="i386 x86_64" SRCROOT=$PWD OBJROOT=$PWD/obj SYMROOT=$PWD/sym \
DSTROOT=$PWD/dst