Да кто этот ваш

src/libmagic_port.c:52:10: fatal error: magic.h: No such file or directory
#include <magic.h>
^~~~~~~~~
compilation terminated.
Makefile:16: recipe for target 'priv/libmagic_port' failed
make: *** [priv/libmagic_port]
could not compile dependency :majic, "mix compile" failed.