[makefile] make: *** No rule to make target `all'. Stop

I keep getting this error:

make: *** No rule to make target `all'.  Stop.

Even though my make file looks like this:

CC=gcc
CFLAGS=-c -Wall

all: build

build: inputText.o outputText.o main.o
    gcc main.o inputText.o outputText.o -o main

main.o: main.c
    $(CC) $(CFLAGS) main.c -o main.o

inputText.o: inputText.c
    $(CC) $(CFLAGS) inputText.c -o inputText.o

outputText.o: outputText.c
    $(CC) $(CFLAGS) outputText.c -o outputText.o

Yes there should be a tab space underneath the target and there is in my make file.

I can get it to work if I try one of the targets like main.o, inputText.o and outputText.o but can't with either build or all.

EDIT: I just randomly tried running make and telling it the file using the following command:

make -f make

This works but why doesn't just typing make work?