diff --git a/src/main.rs b/src/main.rs
index 45348b3..3a7cc78 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,5 @@
 #![feature(let_chains)]
 #![feature(extend_one)]
-#![feature(array_chunks)]
 
 use anyhow::{Context, Result};
 use clap::{Parser, Subcommand};
@@ -38,7 +37,7 @@ struct Cli {
     region: Option<String>,
 
     /// If unspecifed, will get it from AWS_ENDPOINT_URL envar or the AWS default
-    /// e.g. s3.example.com
+    /// e.g. https://s3.example.com
     #[arg(long)]
     endpoint: Option<String>,
 
@@ -62,6 +61,7 @@ async fn main() -> Result<()> {
     let filter = EnvFilter::from_default_env();
     let subscriber = FmtSubscriber::builder().with_env_filter(filter).finish();
     tracing::subscriber::set_global_default(subscriber)?;
+
     let cli = Cli::parse();
     let nixcp = Box::leak(Box::new(NixCp::new(&cli).await?));
 
diff --git a/src/nixcp.rs b/src/nixcp.rs
index c0298bd..a215923 100644
--- a/src/nixcp.rs
+++ b/src/nixcp.rs
@@ -2,7 +2,7 @@ use std::{
     fs,
     iter::once,
     sync::{
-        Arc, Mutex,
+        Arc,
         atomic::{AtomicUsize, Ordering},
     },
 };
@@ -13,7 +13,7 @@ use aws_sdk_s3 as s3;
 use futures::future::join_all;
 use nix_compat::narinfo::{self, SigningKey};
 use tokio::sync::{RwLock, Semaphore, mpsc};
-use tracing::{debug, info, trace, warn};
+use tracing::{debug, info, trace};
 use url::Url;
 
 use crate::{Cli, path_info::PathInfo, uploader::Uploader};
@@ -132,7 +132,6 @@ impl NixCp {
 
     async fn upload(&'static self, mut rx: mpsc::Receiver<PathInfo>) -> Result<()> {
         let upload_count = AtomicUsize::new(0);
-        let failures: Arc<Mutex<Vec<String>>> = Arc::new(Mutex::new(Vec::new()));
         let permits = Arc::new(Semaphore::new(10));
         let mut uploads = Vec::with_capacity(10);
 
@@ -155,7 +154,12 @@ impl NixCp {
                 });
                 uploads.push(fut);
             } else {
-                join_all(uploads).await;
+                join_all(uploads)
+                    .await
+                    .into_iter()
+                    .flatten()
+                    .collect::<Result<Vec<_>>>()?;
+
                 println!("uploaded: {}", upload_count.load(Ordering::Relaxed));
                 println!(
                     "skipped because of signature match: {}",
@@ -165,14 +169,6 @@ impl NixCp {
                     "skipped because of upstream hit: {}",
                     self.upstream_hit_count.load(Ordering::Relaxed)
                 );
-
-                let failures = failures.lock().unwrap();
-                if !failures.is_empty() {
-                    warn!("failed to upload these paths: ");
-                    for failure in failures.iter() {
-                        warn!("{}", failure);
-                    }
-                }
                 break;
             }
         }
diff --git a/src/uploader.rs b/src/uploader.rs
index 558e411..e52e4ae 100644
--- a/src/uploader.rs
+++ b/src/uploader.rs
@@ -46,13 +46,14 @@ impl<'a> Uploader<'a> {
         let nar = self.compress_nar(&nar).await;
 
         // update fields that we know after compression
-        nar_info.file_size = Some(nar.len() as u64);
         let mut hasher = Sha256::new();
         hasher.update(&nar);
         let hash: [u8; 32] = hasher.finalize().into();
         let nar_url = self.nar_url(&hash);
         nar_info.file_hash = Some(hash);
-        debug!("uploading to bucket with key: {nar_url}");
+        nar_info.file_size = Some(nar.len() as u64);
+        nar_info.url = nar_url.as_str();
+        debug!("uploading nar with key: {nar_url}");
 
         if nar.len() < MULTIPART_CUTOFF {
             let put_object = self
@@ -75,7 +76,7 @@ impl<'a> Uploader<'a> {
             let upload_id = multipart.upload_id().unwrap();
 
             let mut parts = Vec::with_capacity(nar.len() / MULTIPART_CUTOFF);
-            let chunks = nar.array_chunks::<MULTIPART_CUTOFF>();
+            let chunks = nar.chunks(MULTIPART_CUTOFF);
             for (i, chunk) in chunks.enumerate() {
                 parts.push(tokio::task::spawn(
                     self.s3_client
@@ -122,10 +123,12 @@ impl<'a> Uploader<'a> {
             debug!("complete multipart upload: {:#?}", complete_mp_upload);
         }
 
+        let narinfo_url = format!("{}.narinfo", self.path.digest());
+        debug!("uploading narinfo with key {narinfo_url}");
         self.s3_client
             .put_object()
             .bucket(&self.bucket)
-            .key(format!("{}.narinfo", self.path.digest()))
+            .key(narinfo_url)
             .body(nar_info.to_string().as_bytes().to_vec().into())
             .send()
             .await?;