diff --git a/posix.mak b/posix.mak
index 217028ccca..a03803bcad 100644
--- a/posix.mak
+++ b/posix.mak
@@ -55,6 +55,8 @@ PHOBOS_STABLE_DIR_GENERATED=$(GENERATED)/phobos-release
 #   Makefile dependencies and rules
 PHOBOS_FILES := $(shell find $(PHOBOS_DIR) -name '*.d' -o -name '*.mak' -o -name '*.ddoc')
 PHOBOS_FILES_GENERATED := $(subst $(PHOBOS_DIR), $(PHOBOS_DIR_GENERATED), $(PHOBOS_FILES))
+$(shell [ ! -d $(PHOBOS_DIR) ] && git clone --depth=1 ${GIT_HOME}/phobos $(PHOBOS_DIR))
+$(shell [ ! -d $(PHOBOS_STABLE_DIR) ] && git clone -b v${LATEST} --depth=1 ${GIT_HOME}/phobos $(PHOBOS_STABLE_DIR))
 PHOBOS_STABLE_FILES := $(shell find $(PHOBOS_STABLE_DIR) -name '*.d' -o -name '*.mak' -o -name '*.ddoc')
 PHOBOS_STABLE_FILES_GENERATED := $(subst $(PHOBOS_STABLE_DIR), $(PHOBOS_STABLE_DIR_GENERATED), $(PHOBOS_STABLE_FILES))
 ################################################################################