Display / dynamic path to image?

I tried to work with substitions…

When i define on the top of the esp-file

substitutions:
  zodiacsign: !include zodiacsign.yaml

(inside the zodiacsign.yaml is just the name of the zodiacsign, now “taurus”)
i can use $zodiacsign in the path…

it.image(37, 2, id($zodiacsign));

The problem is, i have found no way to read in the zodiacsign.yaml, when the zodiac changes…
i have to flash the esp32 to re-read the zodiacsign.yaml with !include…