diff --git a/README.md b/README.md
index 2d331f9..4cd83c8 100644
--- a/README.md
+++ b/README.md
@@ -28,14 +28,14 @@ cargo build
 ### Build static with container
 
 ```bash
-for link_type in static-build ubuntu-22.04; do
-  docker build -t x2t-sandbox-builder:copy-to-data -f build/Dockerfile.$link_type --target copy-to-data .
-  docker run -it --rm -v output/$link_type:/data x2t-sandbox-builder:copy-to-data
-done
+docker build -t x2t-sandbox-builder:copy-to-data -f build/Dockerfile.static --target copy-to-data .
+docker run -it --rm -v /path/to/put/output/:/data x2t-sandbox-builder:copy-to-data
 
 /output/path/x2t-sandbox --help
 ```
 
+And there is [Dockerfile](./build/Dockerfile.ubuntu) for you to build for ubuntu. base image can be specified by argument `--build-arg BASE=library/ubuntu:22.04`. default base image is ubuntu:20.04
+
 ### Generate syscalls with strace
 
 ```bash
diff --git a/build/Dockerfile.ubuntu-22.04 b/build/Dockerfile.ubuntu
similarity index 60%
rename from build/Dockerfile.ubuntu-22.04
rename to build/Dockerfile.ubuntu
index 276f2d5..14d3df9 100644
--- a/build/Dockerfile.ubuntu-22.04
+++ b/build/Dockerfile.ubuntu
@@ -1,14 +1,14 @@
 ARG  REGISTRY=docker.io
-ARG  BASE=library/ubuntu:22.04
+ARG  BASE=library/ubuntu:20.04
 
 FROM ${REGISTRY}/${BASE} as base
 
 FROM base as builder
-RUN  apt update && apt install build-essential libseccomp-dev -y
-RUN  curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+RUN  ln -svf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && apt update && apt install build-essential libseccomp-dev curl pkg-config -y
+RUN  curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | bash -s - -y
 COPY . /src
 WORKDIR /src
-RUN  cargo build --release
+RUN  /root/.cargo/bin/cargo build --release
 
 FROM base as runtime
 RUN  apt update && apt install libseccomp -y && rm -rf /var/apt
@@ -16,5 +16,5 @@ COPY --from=builder /src/target/release/x2t-sandbox /usr/local/bin/x2t-sandbox
 
 FROM base as copy-to-data
 COPY --from=builder /src/target/release/x2t-sandbox /x2t-sandbox
-CMD  ["cp", "-v", "/x2t-sandbox", "/data/x2t-sandbox"]
+CMD  ["cp", "-v", "x2t-sandbox", "/data/x2t-sandbox"]