Why is my makefile not generating the .exe? - c++

Question

I've started to code on Visual Studio Code (I was coding on IDE before) and to make project I learned that you need to do a makefile to link the file in your project.
So i searched a lot of tuto and i come up with this:
DEBUG=yes
CXX=g++
ifeq ($(DEBUG),yes)
CXXFLAGS=-W -Wall -ansi -pedantic -g
LDFLAGS=
else
CXXFLAGS=-W -Wall -ansi -pedantic
LDFLAGS=
endif
OBJDIR:= obj
EXECDIR:= bin
VPATH=src
EXEC=$(VPATH)/prog
SRC= $(wildcard src/*.cpp)
OBJECTS= main.o hello.o
OBJ= $(addprefix $(OBJDIR)/,$(OBJECTS))
all : $(EXEC)
ifeq ($(DEBUG),yes)
#echo "Generation en mode debug"
else
#echo "Generation en mode release"
endif
$(EXECDIR)/$(EXEC): $(OBJ) | $(EXECDIR)
$(CXX) $(CXXFLAGS) -o $# $^
$(EXECDIR):
mkdir $(EXECDIR)
$(OBJDIR)/main.o: src/hello.hpp
$(OBJDIR)/hello.o: src/hello.hpp
$(OBJDIR)/%.o: src/%.cpp | $(OBJDIR)
#$(CXX) -o $# -c $< $(CXXFLAGS)
$(OBJDIR):
mkdir $(OBJDIR)
.PHONY: clean mrproper
clean:
#rm -rf *.o
mrproper: clean
#rm -rf $(EXEC)
but I have a little problem ...
xe: cannot open output file /prog.exe: Permission denied
collect2.exe: error: ld returned 1 exit status
mingw32-make: *** [makefile:26: /prog] Error 1
And i really don't know why it is doing this