diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 0bee7e2..35a4141 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -25,7 +25,13 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update && sudo apt-get upgrade -y && \
-          sudo apt-get install -y lld protobuf-compiler libprotobuf-dev  lintian
+          sudo apt-get install -y lld protobuf-compiler libprotobuf-dev lintian
+      - name: Setup Buf
+        uses: bufbuild/buf-setup-action@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Lint protobuf files
+        uses: bufbuild/buf-lint-action@v1
       - name: Run clippy lint
         run: cargo hack clippy --all-targets --each-feature --workspace
       - name: Run tests
diff --git a/Cargo.lock b/Cargo.lock
index ffdd586..5f8e23a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1126,6 +1126,7 @@ dependencies = [
  "tokio",
  "tokio-stream",
  "tonic",
+ "tonic-buf-build",
  "tonic-build",
 ]
 
@@ -1135,10 +1136,8 @@ version = "0.1.0"
 dependencies = [
  "async-trait",
  "futures",
- "pin-project",
  "temp-dir",
  "tokio",
- "tokio-stream",
 ]
 
 [[package]]
@@ -1191,6 +1190,12 @@ version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
 [[package]]
 name = "serde"
 version = "1.0.197"
@@ -1253,6 +1258,19 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_yaml"
+version = "0.9.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0623d197252096520c6f2a5e1171ee436e5af99a5d7caa2891e55e61950e6d9"
+dependencies = [
+ "indexmap 2.2.5",
+ "itoa",
+ "ryu",
+ "serde",
+ "unsafe-libyaml",
+]
+
 [[package]]
 name = "sh"
 version = "0.2.1"
@@ -1407,7 +1425,6 @@ dependencies = [
  "futures-core",
  "pin-project-lite",
  "tokio",
- "tokio-util",
 ]
 
 [[package]]
@@ -1485,6 +1502,20 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "tonic-buf-build"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89fb2d0fdd379526f80038c2bfbc5be061ff966b84b402b8131dbff4015ba25d"
+dependencies = [
+ "prost-build",
+ "scopeguard",
+ "serde",
+ "serde_yaml",
+ "tonic-build",
+ "uuid",
+]
+
 [[package]]
 name = "tonic-build"
 version = "0.11.0"
@@ -1574,12 +1605,28 @@ version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
+[[package]]
+name = "unsafe-libyaml"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "673aac59facbab8a9007c7f6108d11f63b603f7cabff99fabf650fea5c32b861"
+
 [[package]]
 name = "utf8parse"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "uuid"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a183cf7feeba97b4dd1c0d46788634f6221d87fa961b305bed08c851829efcc0"
+dependencies = [
+ "getrandom",
+ "rand",
+]
+
 [[package]]
 name = "uzers"
 version = "0.11.3"
@@ -1758,29 +1805,11 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "xshell"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce2107fe03e558353b4c71ad7626d58ed82efaf56c54134228608893c77023ad"
-dependencies = [
- "xshell-macros",
-]
-
-[[package]]
-name = "xshell-macros"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e2c411759b501fb9501aac2b1b2d287a6e93e5bdcf13c25306b23e1b716dd0e"
-
 [[package]]
 name = "xtask"
 version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
- "serde",
- "serde_json",
  "sh",
- "xshell",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 234309a..c8bb990 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -75,6 +75,27 @@ suggests = "pypy3"
 section = "net"
 systemd-units = { enable = false }
 
+[package.metadata.generate-rpm]
+
+[[package.metadata.generate-rpm.assets]]
+source = "target/release/rsjudge"
+dest = "/usr/bin/rsjudge"
+mode = "755"
+
+[[package.metadata.generate-rpm.assets]]
+source = "templates/*"
+dest = "/etc/rsjudge/"
+mode = "644"
+
+[[package.metadata.generate-rpm.assets]]
+source = "target/assets/rsjudge.1"
+dest = "/usr/share/man/man1/rsjudge.1"
+mode = "644"
+
+[[package.metadata.generate-rpm.assets]]
+source = "README.adoc"
+dest = "/usr/share/doc/rsjudge/README"
+
 [dependencies]
 # Workspace dependencies
 rsjudge-judger = { version = "0.1.0", path = "crates/rsjudge-judger" }
diff --git a/buf.work.yaml b/buf.work.yaml
new file mode 100644
index 0000000..0b7a593
--- /dev/null
+++ b/buf.work.yaml
@@ -0,0 +1,3 @@
+version: v1
+directories:
+  - crates/rsjudge-grpc/proto
diff --git a/crates/rsjudge-grpc/build.rs b/crates/rsjudge-grpc/build.rs
index 34e643b..8f61517 100644
--- a/crates/rsjudge-grpc/build.rs
+++ b/crates/rsjudge-grpc/build.rs
@@ -9,9 +9,16 @@ use tonic_build::compile_protos;
 ///
 /// `buf` is needed to run this build script.
 fn main() -> anyhow::Result<()> {
-    let proto_out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
-
-    let buf_ls_files = Command::new("buf").args(["ls-files"]).output()?;
+    let proto_out_dir = {
+        let mut out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
+        out_dir.push("proto");
+        out_dir
+    };
+
+    let buf_ls_files = Command::new("buf")
+        .current_dir("proto")
+        .args(["ls-files"])
+        .output()?;
 
     assert!(
         buf_ls_files.status.success(),
diff --git a/xtask/Cargo.toml b/xtask/Cargo.toml
index 973fb1a..bdf060c 100644
--- a/xtask/Cargo.toml
+++ b/xtask/Cargo.toml
@@ -11,10 +11,7 @@ rust-version.workspace = true
 [dependencies]
 anyhow = "1.0.80"
 clap = { version = "4.5.1", features = ["derive"] }
-serde = { version = "1.0.197", features = ["derive"] }
-serde_json = "1.0.114"
 sh = "0.2.1"
-xshell = "0.2.5"
 
 [features]
 dbg = []
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
index d82cf38..dbd980f 100644
--- a/xtask/src/main.rs
+++ b/xtask/src/main.rs
@@ -1,7 +1,7 @@
 use std::{env::set_current_dir, path::Path};
 
 use clap::{Parser, ValueEnum};
-use xshell::{cmd, Shell};
+use sh::cmd;
 
 #[derive(Debug, ValueEnum, Clone, Copy, PartialEq, Eq)]
 /// Package distribution-specific packages.
@@ -32,22 +32,19 @@ enum Command {
 fn main() -> anyhow::Result<()> {
     let command = Command::parse();
 
-    // chdir to the workspace root so that the xtask can be invoked from anywhere.
-    // Assume that the xtask is in {project_root}/xtask
+    // chdir to the workspace root so that `cargo xtask` can be invoked from anywhere.
     set_current_dir(Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap())?;
 
-    let sh = Shell::new()?;
-    {
-        match command {
-            Command::Dist { package } => match package {
-                Package::Deb => cmd!(sh, "cargo deb -v"),
-                Package::Rpm => todo!("Not implemented"),
-            },
-            Command::Docker => cmd!(sh, "docker build -t rsjudge ."),
-            #[cfg(feature = "dbg")]
-            Command::Debug => return Ok(()),
-        }
-        .run()?
+    match command {
+        Command::Dist { package } => match package {
+            Package::Deb => cmd!(cargo deb "-v"),
+            Package::Rpm => todo!("Not implemented"),
+        },
+        Command::Docker => cmd!(docker build "-t" rsjudge "."),
+        #[cfg(feature = "dbg")]
+        Command::Debug => return Ok(()),
     }
+    .try_for_each(|cmd| cmd.exec())?;
+
     Ok(())
 }