diff --git a/eosio_build.sh b/eosio_build.sh
index 9b41e40038a520f6783b77878f0f4eef1bb9f602..3c92d6414c9b7b18341c3cc203e1ef4c9a98d6e1 100755
--- a/eosio_build.sh
+++ b/eosio_build.sh
@@ -145,7 +145,7 @@
 
    printf "\n\t>>>>>>>>>>>>>>>>>>>> EOSIO has been successfully built.\n\n"
 
-   if [ -n ${EOSIO_BUILD_PACKAGE} ]; then
+   if [ "x${EOSIO_BUILD_PACKAGE}" != "x" ]; then
       # Build eos.io package
       $CMAKE -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_CXX_COMPILER=${CXX_COMPILER} \
       -DCMAKE_C_COMPILER=${C_COMPILER} -DWASM_ROOT=${WASM_ROOT} \