Bash script from makefile - it is called each time i call make

Shell Programming and Scripting
1

I've created a tag in the makefile:

mytag: $(shell ${PWD}/script.sh)

When i do: make clean - the script is executed

When i perform make or make mytag the script is again executed with the output:

make: Nothing to be done for mytag

What i want ?
I want script.sh to be executed only when i perform make mytag

Thanks

---------- Post updated at 09:57 AM ---------- Previous update was at 06:00 AM ----------

default tag was missing from my Makefile , and i've put

mytag: 
	$(shell ${PWD}/script.sh)