diff --git a/posix.mak b/posix.mak
index 946ba01..57a7a87 100644
--- a/posix.mak
+++ b/posix.mak
@@ -9,9 +9,11 @@ DUB=dub
 WITH_DOC = no
 DOC = ../dlang.org
 
+# Load operating system $(OS) (e.g. linux, osx, ...) and $(MODEL) (e.g. 32, 64) detection Makefile from dmd
 $(shell [ ! -d $(DMD_DIR) ] && git clone --depth=1 https://github.com/dlang/dmd $(DMD_DIR))
 include $(DMD_DIR)/src/osmodel.mak
 
+# Build folder for all binaries
 ROOT_OF_THEM_ALL = generated
 ROOT = $(ROOT_OF_THEM_ALL)/$(OS)/$(MODEL)