diff --git a/src/main.rs b/src/main.rs
index 3a41c95..723788b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -53,7 +53,9 @@ fn main() {
     let mut docker_cmd = DockerCmd::new(&docker_image);
     docker_cmd.add_volumn(&get_final_docker_registry(&docker_image), "/usr/local/cargo/registry");
     if let Some(mirror) = &crates_mirror.or(docker_build_config.mirror) {
-        if mirror.to_lowercase() != "none" {
+        if mirror.to_lowercase() == "none" {
+            docker_cmd.mirror(&None);
+        } else {
             docker_cmd.mirror(&Some(mirror));
         }
     }