diff --git a/cz/src/compression.rs b/cz/src/compression.rs
index 7990430..80cf2fd 100644
--- a/cz/src/compression.rs
+++ b/cz/src/compression.rs
@@ -1,7 +1,7 @@
 use byteorder::{ReadBytesExt, WriteBytesExt, LE};
 use std::{
     collections::HashMap,
-    io::{Cursor, Read, Seek, Write},
+    io::{Read, Seek, Write},
 };
 
 use crate::binio::BitIo;
@@ -362,8 +362,7 @@ fn compress_lzw2(data: &[u8], last: Vec<u8>) -> (usize, Vec<u8>, Vec<u8>) {
         element = last
     }
 
-    let output_buf = Vec::new();
-    let mut bit_io = BitIo::new(output_buf);
+    let mut bit_io = BitIo::new(vec![0u8; 0xF0000]);
     let write_bit = |bit_io: &mut BitIo, code: u64| {
         if code > 0x7FFF {
             bit_io.write_bit(1, 1);
diff --git a/utils/Cargo.toml b/utils/Cargo.toml
index 4e726fc..136bb7d 100644
--- a/utils/Cargo.toml
+++ b/utils/Cargo.toml
@@ -1,9 +1,10 @@
 [package]
 name = "utils"
-version = "0.1.2"
+version = "0.2.0"
 edition = "2021"
 license = "GPL-3.0-or-later"
 authors.workspace = true
+build = "build.rs"
 
 [[bin]]
 name = "czutil"
@@ -16,7 +17,10 @@ cz = { path = "../cz/", features = ["png"] }
 luca_pak = { path = "../luca_pak/" }
 
 image = { version = "0.25", default-features = false, features = ["png"] }
-clap = { version = "4.5.9", features = ["derive"] }
+clap = { version = "4.5", features = ["derive", "error-context"] }
+
+[build-dependencies]
+vergen-git2 = { version = "1.0", features = ["build", "cargo", "rustc", "si"] }
 
 [lints]
 workspace = true
diff --git a/utils/build.rs b/utils/build.rs
new file mode 100644
index 0000000..98d09a2
--- /dev/null
+++ b/utils/build.rs
@@ -0,0 +1,17 @@
+use vergen_git2::{BuildBuilder, CargoBuilder, Emitter, Git2Builder, RustcBuilder, SysinfoBuilder};
+
+fn main() {
+    let build = BuildBuilder::all_build().unwrap();
+    let cargo = CargoBuilder::all_cargo().unwrap();
+    let git2 = Git2Builder::all_git().unwrap();
+    let rustc = RustcBuilder::all_rustc().unwrap();
+    let si = SysinfoBuilder::all_sysinfo().unwrap();
+
+    Emitter::default()
+        .add_instructions(&build).unwrap()
+        .add_instructions(&cargo).unwrap()
+        .add_instructions(&git2).unwrap()
+        .add_instructions(&rustc).unwrap()
+        .add_instructions(&si).unwrap()
+        .emit().unwrap();
+}
diff --git a/utils/src/bin/czutil.rs b/utils/src/bin/czutil.rs
index 673578a..19ed478 100644
--- a/utils/src/bin/czutil.rs
+++ b/utils/src/bin/czutil.rs
@@ -1,17 +1,22 @@
-use clap::{error::ErrorKind, Error, Parser, Subcommand};
+use clap::{error::ErrorKind, Command, Error, Parser, Subcommand};
 use std::{
     fs,
-    path::{Path, PathBuf},
+    path::{Path, PathBuf}, process::exit,
 };
 
 /// Utility to maniuplate CZ image files from the LUCA System game engine by
 /// Prototype Ltd.
 #[derive(Parser)]
 #[command(name = "CZ Utility")]
-#[command(version, about, long_about = None)]
+#[command(author, version, about, long_about = None, disable_version_flag = true)]
+#[command(arg_required_else_help(true))]
 struct Cli {
+    /// Show program version information
+    #[arg(short('V'), long)]
+    version: bool,
+
     #[command(subcommand)]
-    command: Commands,
+    command: Option<Commands>,
 }
 
 #[derive(Subcommand)]
@@ -63,8 +68,24 @@ enum Commands {
 fn main() {
     let cli = Cli::parse();
 
+    if cli.version {
+        println!(
+            "{}, {} v{}-{}",
+            env!("CARGO_BIN_NAME"),
+            env!("CARGO_PKG_NAME"),
+            env!("CARGO_PKG_VERSION"),
+            &env!("VERGEN_GIT_SHA")[0..=6]
+        );
+        exit(0);
+    }
+
+    let command = match cli.command {
+        Some(c) => c,
+        None => exit(0),
+    };
+
     // Check what subcommand was run
-    match &cli.command {
+    match &command {
         Commands::Decode {
             input,
             output,
diff --git a/utils/src/bin/pakutil.rs b/utils/src/bin/pakutil.rs
index 46c7603..66659b2 100644
--- a/utils/src/bin/pakutil.rs
+++ b/utils/src/bin/pakutil.rs
@@ -3,19 +3,23 @@ use clap::{
     Parser, Subcommand,
 };
 use luca_pak::Pak;
-use std::{fs, path::PathBuf};
+use std::{fs, path::PathBuf, process::exit};
 
 /// Utility to maniuplate PAK archive files from the LUCA System game engine by
 /// Prototype Ltd.
 #[derive(Parser)]
 #[command(name = "PAK Utility")]
-#[command(version, about, long_about = None)]
+#[command(author, version, about, long_about = None, disable_version_flag = true)]
 struct Cli {
-    #[arg(value_name = "PAK FILE")]
-    input: PathBuf,
+    /// Show program version information
+    #[arg(short('V'), long)]
+    version: bool,
+
+    #[arg(value_name = "PAK FILE", required_unless_present("version"))]
+    input: Option<PathBuf>,
 
     #[command(subcommand)]
-    command: Commands,
+    command: Option<Commands>,
 }
 
 #[derive(Subcommand)]
@@ -59,12 +63,30 @@ enum Commands {
 fn main() {
     let cli = Cli::parse();
 
-    let mut pak = match Pak::open(&cli.input) {
+    if cli.version {
+        println!(
+            "{}, {} v{}-{}",
+            env!("CARGO_BIN_NAME"),
+                 env!("CARGO_PKG_NAME"),
+                 env!("CARGO_PKG_VERSION"),
+                 &env!("VERGEN_GIT_SHA")[0..=6]
+        );
+        exit(0);
+    }
+
+    let mut pak = match Pak::open(&cli.input.unwrap()) {
         Ok(pak) => pak,
         Err(err) => fmt_error(&format!("Could not open PAK file: {}", err)).exit(),
     };
 
-    match cli.command {
+    let command = match cli.command {
+        Some(c) => c,
+        None => {
+            exit(0);
+        },
+    };
+
+    match command {
         Commands::Extract { output } => {
             if output.exists() && !output.is_dir() {
                 fmt_error("The output given was not a directory").exit()
@@ -74,7 +96,11 @@ fn main() {
 
             for entry in pak.entries() {
                 let mut outpath = output.clone();
-                outpath.push(entry.display_name());
+                if let Some(n) = entry.name() {
+                    outpath.push(n);
+                } else {
+                    outpath.push(entry.index().to_string())
+                }
                 entry.save(&outpath).unwrap();
             }
         }