$> make week02
rm week02 week02.{hi,o} -f
ghc week02.hs -O2 --make
[1 of 5] Compiling Algo.Cluster     ( Algo/Cluster.hs, Algo/Cluster.o )
[5 of 5] Compiling Main             ( week02.hs, week02.o )
Linking week02 ...
./week02
Exercise 1: 106
cc   week02.o week02-clean week02-compile week02-run   -o week02
gcc: week02-clean: No such file or directory
gcc: week02-compile: No such file or directory
gcc: week02-run: No such file or directory
make: *** [week02] Error 1

$> cat Makefile
###############################################################################
week01-compile:
	ghc week01.hs -O2 --make

week01-run:
	./week01

week01-clean:
	rm week01 week01.{hi,o} -f

week01: week01-clean week01-compile week01-run


###############################################################################
week02-compile:
	ghc week02.hs -O2 --make

week02-run:
	./week02

week02-clean:
	rm week02 week02.{hi,o} -f

week02: week02-clean week02-compile week02-run