diff --git a/config/vars.mk b/config/vars.mk
index 76e0950..4b14389 100644
--- a/config/vars.mk
+++ b/config/vars.mk
@@ -29,7 +29,7 @@ CUR_DIR := $(shell pwd)
 
 # NDK config
 NDK_DIR := "../android-ndk"
-$(shell "source "$(CUR_DIR)/config/ndk.sh"")
+$(shell "cd $(CUR_DIR)/config && ./ndk.sh && cd $(CUR_DIR)")
 
 ifeq ($(OS),Linux)
         TOOLCHAIN := $(NDK_DIR)/toolchains/llvm/prebuilt/darwin-x86_64