FASMINC environment variable

I want to suggest introducing an additional environment variable: FASMINC.
Variable INCLUDE is one for all languages. It need to be redefined each time (e.g. in BAT file).

Version 1: use FASMINC variable if it's set, otherwise use INCLUDE (in my opinion, this is more logical).

Code:

        mov     edi,[memory_start]
        mov     [include_paths],edi
        mov     esi,fasminc_variable ; modified by Jin X
        push    edi                  ; added by Jin X
        call    get_environment_variable
;-- added by Jin X --;
        pop     eax
        cmp     edi,eax
        jne     skip_include
        mov     esi,include_variable
        call    get_environment_variable
      skip_include:
;--------------------;
        xor     al,al
        stos    byte [edi]

Version 2: use both variables: %FASMINC%;%INCLUDE%.

Code:

        mov     edi,[memory_start]
        mov     [include_paths],edi
        mov     esi,fasminc_variable ; modified by Jin X
        call    get_environment_variable
;-- added by Jin X --;
        mov     al,';'
        stosb
        mov     esi,include_variable
        call    get_environment_variable
;--------------------;
        xor     al,al
        stos    byte [edi]

Sources are included (marked with comments "Jin X").

How do you like this idea?