diff --git a/src/defconfig b/src/defconfig
index d993422..c0fe099 100644
--- a/src/defconfig
+++ b/src/defconfig
@@ -1,4 +1,5 @@
 CT_CONFIG_VERSION="4"
+CT_LOCAL_TARBALLS_DIR=""
 CT_PREFIX_DIR="${CT_TOP_DIR}/out"
 CT_ARCH_ARM=y
 CT_ARCH_CPU="cortex-a7"
@@ -8,6 +9,5 @@ CT_ARCH_FLOAT_HW=y
 CT_KERNEL_LINUX=y
 CT_LINUX_V_4_19=y
 # CT_CC_GCC_STATIC_LIBSTDCXX is not set
-CT_CC_GCC_SYSTEM_ZLIB=y
 # CT_CC_GCC_USE_LTO is not set
 CT_CC_LANG_CXX=y