SRC_FILES =                                                                   \
builtins/cd                                                                   \
builtins/echo                                                                 \
builtins/env                                                                  \
builtins/exit                                                                 \
builtins/export                                                               \
builtins/pwd                                                                  \
builtins/unset                                                                \
run_arithmetic/arithmetic                                                     \
run_arithmetic/arithmetic_operation                                           \
run_ast                                                                       \