diff --git a/Makefile b/Makefile
index 9fb7af9..ed33232 100644
--- a/Makefile
+++ b/Makefile
@@ -1,26 +1,43 @@
 
+UNAME := $(shell uname)
+
 CXXFLAGS = -std=c++14
 
 SOURCES = Test.cpp
 
+# LINUX version
+ifeq ($(UNAME), Linux)
+TARGETS := build/hello-linux-64 build/hello-win64.exe build/hello-macosx.bin
+endif
 
-all:
+# WINDOWS version
+ifeq ($(UNAME), MINGW32_NT-10.0)
+TARGETS := build/hello-win64.exe
+endif
+
+all: $(TARGETS)
+	echo $(UNAME)
+
+build/hello-linux-64:
 	mkdir -p build
 	x86_64-linux-gnu-g++      Test.cpp -o build/hello-linux-64
-	x86_64-w64-mingw32-g++    Test.cpp -o build/hello-win64.exe
-	x86_64-apple-darwin19-c++ Test.cpp -o build/hello-macosx.bin
 
+build/hello-win64.exe:
+	mkdir -p build
+	x86_64-w64-mingw32-g++    Test.cpp -o build/hello-win64.exe
+
+build/hello-macosx.bin:
+	x86_64-apple-darwin19-c++ Test.cpp -o build/hello-macosx.bin
+	mkdir -p build
 
 tidy:
 	mkdir -p build
 	chmod u+x ./clang-tidy-to-junit.py
 	clang-tidy -checks='c*,l*,m*' $(SOURCES) -- $(CXXFLAGS) | ./clang-tidy-to-junit.py $(PWD)/ > build/tidy.xml
 
-
 test:
 	mkdir -p build
-	echo "Blah" > build/tests.xml
-
+	echo "" > build/tests.xml
 
 publish:
 	echo "Publish..."