diff --git a/code/ch01-01/.gitignore b/code/.gitignore
similarity index 100%
rename from code/ch01-01/.gitignore
rename to code/.gitignore
diff --git a/code/Cargo.toml b/code/Cargo.toml
new file mode 100644
index 0000000..cdb9b9f
--- /dev/null
+++ b/code/Cargo.toml
@@ -0,0 +1,4 @@
+[workspace]
+members = [
+    "ch01-01",
+]
diff --git a/code/ch01-01/Cargo.toml b/code/ch01-01/Cargo.toml
index c1e21a8..fe27721 100644
--- a/code/ch01-01/Cargo.toml
+++ b/code/ch01-01/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "zcore"
+name = "ch01-01"
 version = "0.1.0"
 authors = ["Runji Wang <wangrunji0408@163.com>"]
 edition = "2018"
diff --git a/code/ch01-01/src/object/object_v1.rs b/code/ch01-01/src/object/object_v1.rs
index 6b9c0ed..f2fc9b5 100644
--- a/code/ch01-01/src/object/object_v1.rs
+++ b/code/ch01-01/src/object/object_v1.rs
@@ -1,4 +1,5 @@
-use super::*;
+#![allow(dead_code)]
+use super::{KernelObject, KoID, String};
 
 // ANCHOR: dummy_def
 use spin::Mutex;
diff --git a/code/ch01-01/rust-toolchain b/code/rust-toolchain
similarity index 100%
rename from code/ch01-01/rust-toolchain
rename to code/rust-toolchain