vlib/v/checker/tests/comptime_env/using_comptime_env.vv:1:1: error: the environment variable "VAR" does not exist.
    1 | #flag -I $env('VAR')/xyz
      | ~~~~~~~~~~~~~~~~~~~~~~~~
    2 | #include "$env('VAR')/stdio.h"
    3 |
vlib/v/checker/tests/comptime_env/using_comptime_env.vv:2:1: error: the environment variable "VAR" does not exist.
    1 | #flag -I $env('VAR')/xyz
    2 | #include "$env('VAR')/stdio.h"
      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    3 | 
    4 | fn main() {
