Dependable systempath

I have two develop machines and one on line server.
On the develop machines I use composer while on the on line server I use the tarball codeigniter installation.
I'm asking if there is an elegant way to modify 

PHP Code:

class Paths
...

public string $systemDirectory = __DIR__ . '/../../vendor/codeigniter4/framework/system'; 


based on .env file

PHP Code:

CI_ENVIRONMENT = development 


for example, is possible to set $systemDirectory in the same .env file?
or, alternatevly, on the files in Config/Boot ?

Thank you