diff --git a/rand/Makefile b/rand/Makefile
index 109f0df..a303bfa 100644
--- a/rand/Makefile
+++ b/rand/Makefile
@@ -1,6 +1,12 @@
+BIN:=random
+OUT?=path_if_not_defined
+
 all: build
 
-build: random
+build: $(BIN)
+	cp -v $(BIN) $(OUT)/
+
+install: $(BIN)
 
-random: main.c
-	gcc main.c -Wall -o random
+$(BIN): main.c
+	gcc main.c -Wall -lm -o $@