diff --git a/src/main.rs b/src/main.rs
index 04289df..3e7090b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,4 @@
-use std::path::PathBuf;
+use std::{path::PathBuf, process::Command};
 
 use git2::{Config, Repository};
 
@@ -15,6 +15,12 @@ enum TciError {
 
 	#[error("git error")]
 	GitError(#[from] git2::Error),
+
+	#[error("subprocess finished with non-zero exit code")]
+	SubprocessError(i32),
+
+	#[error("subprocess terminated")]
+	SubprocessTerminated,
 }
 
 #[derive(Debug, Default, serde::Deserialize)]
@@ -54,20 +60,12 @@ fn main() {
 	}
 }
 
-fn shell<S : AsRef<std::ffi::OsStr>>(cmd: S) -> std::io::Result<String> {
-	let output = std::process::Command::new(cmd).output()?;
-
-	let stderr = match std::str::from_utf8(&output.stderr) {
-		Ok(s) => s.to_string(),
-		Err(_) => format!("{:?}", output.stderr),
-	};
-
-	let stdout = match std::str::from_utf8(&output.stdout) {
-		Ok(s) => s.to_string(),
-		Err(_) => format!("{:?}", output.stdout),
-	};
-
-	Ok(format!("{stderr}{stdout}"))
+fn shell_out<S : AsRef<std::ffi::OsStr>>(cmd: S) -> Result<(), TciError> {
+	match std::process::Command::new(cmd).status()?.code() {
+		Some(0) => Ok(()),
+		Some(x) => Err(TciError::SubprocessError(x)),
+		None => Err(TciError::SubprocessTerminated),
+	}
 }
 
 fn tci(cfg: TciConfig) -> Result<(), Box<dyn std::error::Error>> {
@@ -84,15 +82,15 @@ fn tci(cfg: TciConfig) -> Result<(), Box<dyn std::error::Error>> {
 
 	// run hooks
 	for setup in cfg.setup {
-		print!("[+] setting up ({setup})");
-		println!("{}", shell(setup)?);
+		println!("[+] setting up ({setup})");
+		shell_out(setup)?;
 	}
 
 	let res = tci_hook(&repo_path, &tci_script);
 
 	for cleanup in cfg.cleanup {
-		print!("[-] cleaning up ({cleanup}) ");
-		println!("{}", shell(cleanup)?);
+		println!("[-] cleaning up ({cleanup}) ");
+		shell_out(cleanup)?;
 	}
 
 	res?; // only check error AFTER running cleanup hooks
@@ -126,13 +124,10 @@ fn tci_hook(repo_path: &PathBuf, tci_script: &str) -> Result<(), TciError> {
 		return Err(TciError::MissingScript);
 	}
 
-	std::env::set_current_dir(tmp.path())?;
-
 	println!("[=] running tci script for repo '{name}'");
-	let res = shell(tmp.path().join(tci_script))?;
-	println!("[:] {}", res.replace('\n', "\n[:]"));
-
+	std::env::set_current_dir(tmp.path())?;
+	let res = shell_out(tmp.path().join(tci_script));
 	std::env::set_current_dir(repo_path)?;
 
-	Ok(())
+	res
 }