gen b
generate((['b'], []), {})
   0 Name: c
         : NOTFILE 
         : Depends on b (init) (max time)
    1 Name: b
          : NOTFILE TOUCHED 
make1a c
make1a b
make1b b
-> 0 Name: c
         : Updating it
         : NOTFILE 
         : Depends on b (touched) (max time)
         : Depends on a2 (init) (max time)
->  1 Name: b
          : Been touched, updating it
          : NOTFILE TOUCHED 
    1 Name: a2
          : NOTFILE TOUCHED 
          : Depends on a1 (init) (max time)
     2 Name: a1
           : NOTFILE TOUCHED 
           : Depends on a (init) (max time)
      3 Name: a
            : NOTFILE TOUCHED 
make1c b
make1c b
make1b c
make1a b
make1b c
make1c c
echo c
echo c a2
c a2

make1c c
make1a c