diff --git a/Cargo.lock b/Cargo.lock
index 49cf2c9..e5756f8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6,14 +6,7 @@ version = 3
 name = "coreutils"
 version = "0.0.1"
 dependencies = [
- "sysexits 0.1.0",
-]
-
-[[package]]
-name = "sysexits"
-version = "0.1.0"
-dependencies = [
- "sysexits 0.3.4",
+ "sysexits",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 12e50b6..072d706 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ authors = [
 ]
 
 [dependencies]
-sysexits = { version = "0.1.0", path = "sysexits", package = "sysexits" }
+sysexits = "0.3.4"
 
 [[bin]]
 name = "cat"
diff --git a/src/rs/cat.rs b/src/rs/cat.rs
index 239d364..26073f8 100644
--- a/src/rs/cat.rs
+++ b/src/rs/cat.rs
@@ -5,9 +5,9 @@ use std::fs::read_to_string;
 use std::io;
 use std::io::Write;
 use std::env;
-use std::process;
+use sysexits::ExitCode;
 
-fn main() {
+fn main() -> ExitCode {
   let mut args: Vec<String> = env::args().collect();
   let argv0 = args.remove(0);
   let mut opts = Vec::new();
@@ -29,7 +29,7 @@ fn main() {
 
         _ => {
           println!("Usage: {} [options...] [files...]", argv0);
-          process::exit(64); // sysexits(3) EX_USAGE
+          return ExitCode::Usage;
         },
       };
     }
@@ -44,7 +44,7 @@ fn main() {
           Ok(_) => { val.push_str(&content); },
           Err(_) => {
             println!("Usage: {} [options...] [files...]", argv0);
-            process::exit(64); // sysexits(3) EX_USAGE
+            return ExitCode::Usage;
           },
         };
       },
@@ -54,7 +54,7 @@ fn main() {
           Ok(output) => { val.push_str(&output); },
           Err(_) => {
             println!("{}: {}: No such file or directory.", argv0, path);
-            process::exit(66); // sysexits(3) EX_NOINPUT
+            return ExitCode::NoInput;
           },
         };
       },
@@ -63,4 +63,5 @@ fn main() {
     }
 
   io::stdout().flush().unwrap();
+  ExitCode::Ok
 }
diff --git a/sysexits/Cargo.lock b/sysexits/Cargo.lock
deleted file mode 100644
index e2cc127..0000000
--- a/sysexits/Cargo.lock
+++ /dev/null
@@ -1,16 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 3
-
-[[package]]
-name = "sysexits"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "913b6c9c3fdc55ec78e76e281706cecfe0cfb4ba07545cbce8342ed943dcfa72"
-
-[[package]]
-name = "sysexits-dynamic"
-version = "0.1.0"
-dependencies = [
- "sysexits",
-]
diff --git a/sysexits/Cargo.toml b/sysexits/Cargo.toml
deleted file mode 100644
index 396082f..0000000
--- a/sysexits/Cargo.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[package]
-name = "sysexits"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-sysexits = "0.3.4"
-
-[lib]
-crate-type = ["dylib"]
diff --git a/sysexits/src/lib.rs b/sysexits/src/lib.rs
deleted file mode 100644
index c053940..0000000
--- a/sysexits/src/lib.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub use sysexits::*;