Not only that, but you're not even given the compiler. If all you have is the DNA (even if you had the mitochondrial DNA too), you have source code for a language no one knows with no compiler.
Or, more accurately, it's like having binary machine code for an unknown ISA with no information about the CPU, and no example CPU.
Well based on compiler bootstrapping techniques, it seems the solution is simple: Start by hand-assembling the most basic RNA life, then run each step of evolution in sequence. All you need is the DNA (and know the living conditions) of every single organism between single-celled organisms and a modern human.
Or, more accurately, it's like having binary machine code for an unknown ISA with no information about the CPU, and no example CPU.