Thread: app rule not found despite being there

I get this output:

Code:

make --no-print-directory rebuild
MAKECMDGOALS=rebuild
make -f main.mak rebuild
rm -f *.o
cc -Wall -Wextra -shared -fPIE -o alu_bit.o alu_bit.c
cc -Wall -Wextra -shared -fPIE -o alu_math.o alu_math.c
cc -Wall -Wextra -shared -fPIE -o alu_mem.o alu_mem.c
cc -Wall -Wextra -shared -fPIE -o alu_vec.o alu_vec.c
make[1]: *** No rule to make target 'alu.AppImage', needed by 'build'.  Stop.
make: *** [1st.mak:6: rebuild] Error 2
Compilation failed.

When I go to build the binary that would test the code I made (or at least some of it, getting round to my idea soon)
I know I stuck a rule for %.AppImage in main.mak (same file holding the 'rebuild' target) so I'm a little confused (every time I think I got the hang of the basics make goes and throws a wrench at that thought)