diff --git a/mk/prefix.mk b/mk/prefix.mk
index a96ecdf..b17e423 100644
--- a/mk/prefix.mk
+++ b/mk/prefix.mk
@@ -7,6 +7,9 @@ export PREFIX_RUSTFLAGS=-L $(ROOT)/$(PREFIX_INSTALL)/$(TARGET)/lib
 export RUSTUP_TOOLCHAIN=$(ROOT)/$(PREFIX_INSTALL)
 export REDOXER_TOOLCHAIN=$(RUSTUP_TOOLCHAIN)
 
+export CC=
+export CXX=
+
 prefix: $(PREFIX_INSTALL)
 
 PREFIX_STRIP=\