root:
             version = v1
             creates   file:./
             creates   file:plan.py
             creates   step:./plan.py

file:plan.py
                path = plan.py
               state = STATIC
          created by   root:
            consumes   file:./
            supplies   step:./plan.py

file:./
                path = ./
               state = STATIC
          created by   root:
            supplies   (file:output.txt)
            supplies   file:plan.py
            supplies   step:./plan.py

step:./plan.py
             workdir = ./
             command = ./plan.py
               state = FAILED
          created by   root:
            consumes   file:./
            consumes   file:plan.py

(step:touch output.txt)
             workdir = ./
             command = touch output.txt
               state = SUCCEEDED
       extended hash = yes

(file:output.txt)
                path = output.txt
               state = BUILT
            consumes   file:./
