diff --git a/include/inject.sh b/include/inject.sh
index 0c0a152..c60c297 100644
--- a/include/inject.sh
+++ b/include/inject.sh
@@ -132,7 +132,8 @@ modify_mac()
 	[ -n "$CONFIG_GBE_BIN_PATH" ] || return 1
 
 	x_ cp "${CONFIG_GBE_BIN_PATH##*../}" tmp/gbe
-	[ "$new_mac" != "restore" ] && x_ make -C util/nvmutil && \
+	[ "$new_mac" != "restore" ] && x_ make -C util/nvmutil clean && \
+	    x_ make -C util/nvmutil && \
 	    x_ "$nvm" tmp/gbe setmac "$new_mac"
 
 	fe_ newmac "$tmpromdir" -maxdepth 1 -type f -name "*.rom"