diff --git a/Makefile b/Makefile
index 167385e4..8c990b8f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,16 @@
 nalgebra_lib_path=lib
 nalgebra_doc_path=doc
 all:
+	mkdir -p $(nalgebra_lib_path)
 	rust build src/nalgebra.rc --out-dir $(nalgebra_lib_path)
 
 test:
+	mkdir -p $(nalgebra_lib_path)
 	rust test src/nalgebra.rc
 	rm nalgebratest~
 
 doc:
+	mkdir -p $(nalgebra_doc_path)
 	rust doc src/nalgebra.rc --output-dir $(nalgebra_doc_path)
 
 .PHONY:doc