Using environment variable during another environment variable definiton in flow properties - issue

I thought this was about subflow properties as in the post you linked to and the example I posted.

Edit: For the future please post flows inline as described in this canned message.

In order to make code readable and usable it is necessary to surround your code with three backticks (also known as a left quote or backquote ```)

``` 
   code goes here 
```

See this post for more details - How to share code or flow json