diff --git a/Makefile b/Makefile
index e902b90..8e5c732 100644
--- a/Makefile
+++ b/Makefile
@@ -24,11 +24,15 @@ OBJECTS := $(patsubst $(SRCDIR)/%.cpp, $(OBJDIR)/%.o, $(SOURCES))
 BIN := $(BINDIR)/orbital_shipping
 
 
-all: $(BIN) $(TEST_BIN)
+all: mkdirs $(BIN) $(TEST_BIN)
 .PHONY: all
 
 -include $(OBJDIR)/*.d
 
+mkdirs:
+	mkdir -p ./bin ./build
+.PHONY: mkdirs
+
 $(BIN): $(COMMON_OBJECTS) $(OBJECTS) $(LIB)
 	$(CXX) -o $(BIN) $(LDFLAGS) $(COMMON_OBJECTS) $(OBJECTS) $(LIB)
 
diff --git a/README b/README
index f6a7e7a..c7a7e91 100644
--- a/README
+++ b/README
@@ -13,7 +13,7 @@ TODO:
 
 Building:
 	install dependencies for your environment:
-		eg) $ sudo pacman -S assimp glew glm sdl2 catch2
+		eg) $ sudo pacman -S assimp glew glm sdl2 catch2 gcc make
 	checkout, and initialise submodule dependencies:
 		$ git submodule init
 		$ git submodule update --recursive