makefile에서 환경파일을 의존관계에 추가하고 싶습니다.

[schoi0@SEL-SCHOI0-D2 makefile]$ ls
Makefile  a.c  env_file
[schoi0@SEL-SCHOI0-D2 makefile]$ make
cc    -c -o a.o a.c
cc   a.o   -o a
[schoi0@SEL-SCHOI0-D2 makefile]$ make
make: 'a'은(는) 이미 업데이트되었습니다.
[schoi0@SEL-SCHOI0-D2 makefile]$ touch env_file 
[schoi0@SEL-SCHOI0-D2 makefile]$ make
cc    -c -o a.o a.c
cc   a.o   -o a
[schoi0@SEL-SCHOI0-D2 makefile]$ cat Makefile 
include env_file
 
a: %: %.o
 
*.o: %.o: %.c env_file