diff --git a/crates/crates_io_docs_rs/src/lib.rs b/crates/crates_io_docs_rs/src/lib.rs
index 402f1238132..fc8cd021aad 100644
--- a/crates/crates_io_docs_rs/src/lib.rs
+++ b/crates/crates_io_docs_rs/src/lib.rs
@@ -62,7 +62,7 @@ impl RealDocsRsClient {
             Ok(Some(url)) => url,
             Ok(None) => Url::parse(DEFAULT_BASE_URL).unwrap(),
             Err(err) => {
-                warn!("Failed to parse DOCS_RS_BASE_URL: {err}");
+                warn!("Failed to parse DOCS_RS_BASE_URL: {err:#}");
                 return None;
             }
         };
diff --git a/crates/crates_io_fastly/src/lib.rs b/crates/crates_io_fastly/src/lib.rs
index 396d7dde8f3..094f3fb2aaa 100644
--- a/crates/crates_io_fastly/src/lib.rs
+++ b/crates/crates_io_fastly/src/lib.rs
@@ -17,13 +17,8 @@ pub enum Error {
     #[error("Invalid API token format")]
     InvalidApiToken(#[from] InvalidHeaderValue),
 
-    #[error("Failed to `POST {url}`{}: {source}", status.map(|s| format!(" (status: {})", s)).unwrap_or_default())]
-    PurgeFailed {
-        url: String,
-        status: Option<reqwest::StatusCode>,
-        #[source]
-        source: reqwest::Error,
-    },
+    #[error("Failed to purge Fastly cache")]
+    PurgeFailed(#[source] reqwest::Error),
 }
 
 #[derive(Debug)]
@@ -115,11 +110,7 @@ impl Fastly {
             .header("Fastly-Key", self.token_header_value()?)
             .send()
             .await
-            .map_err(|source| Error::PurgeFailed {
-                url: url.clone(),
-                status: None,
-                source,
-            })?;
+            .map_err(Error::PurgeFailed)?;
 
         let status = response.status();
 
@@ -138,11 +129,7 @@ impl Fastly {
                     "invalidation request to Fastly failed"
                 );
 
-                Err(Error::PurgeFailed {
-                    url,
-                    status: Some(status),
-                    source: error,
-                })
+                Err(Error::PurgeFailed(error))
             }
         }
     }
@@ -267,10 +254,8 @@ mod tests {
 
         std::assert_matches!(
             result,
-            Err(Error::PurgeFailed {
-                status: Some(reqwest::StatusCode::SERVICE_UNAVAILABLE),
-                ..
-            })
+            Err(Error::PurgeFailed(source))
+                if source.status() == Some(reqwest::StatusCode::SERVICE_UNAVAILABLE)
         );
     }
 }
diff --git a/crates/crates_io_tarball/examples/check_all_crates.rs b/crates/crates_io_tarball/examples/check_all_crates.rs
index 8c3941a69a5..de39439beed 100644
--- a/crates/crates_io_tarball/examples/check_all_crates.rs
+++ b/crates/crates_io_tarball/examples/check_all_crates.rs
@@ -87,7 +87,9 @@ async fn process_path(path: &Path, pb: &ProgressBar) {
     pb.suspend(|| match result {
         Ok(result) => debug!(%pkg_name, path = %path.display(), ?result),
         Err(error) => {
-            warn!(%pkg_name, path = %path.display(), "Failed to process tarball: {error}")
+            // Convert to anyhow so `{error:#}` includes the source chain.
+            let error = anyhow::Error::new(error);
+            warn!(%pkg_name, path = %path.display(), "Failed to process tarball: {error:#}")
         }
     })
 }
diff --git a/crates/crates_io_worker/src/worker.rs b/crates/crates_io_worker/src/worker.rs
index c930791ddbd..b16af6d7d55 100644
--- a/crates/crates_io_worker/src/worker.rs
+++ b/crates/crates_io_worker/src/worker.rs
@@ -54,7 +54,7 @@ impl<Context: Clone + Send + Sync + 'static> Worker<Context> {
                     }
                 }
                 Err(error) => {
-                    error!("Failed to run job: {error}");
+                    error!("Failed to run job: {error:#}");
                     sleep(self.poll_interval).await;
                 }
             }
@@ -108,7 +108,7 @@ impl<Context: Clone + Send + Sync + 'static> Worker<Context> {
                     storage::delete_successful_job(conn, job_id).await?
                 }
                 Err(error) => {
-                    warn!("Failed to run job: {error}");
+                    warn!("Failed to run job: {error:#}");
                     storage::update_failed_job(conn, job_id).await;
                 }
             }
diff --git a/src/bin/crates-io/background_worker.rs b/src/bin/crates-io/background_worker.rs
index a596400d909..108ff110bab 100644
--- a/src/bin/crates-io/background_worker.rs
+++ b/src/bin/crates-io/background_worker.rs
@@ -132,7 +132,7 @@ pub fn run() -> anyhow::Result<()> {
         let ctx = ctx.clone();
         move || {
             if let Err(err) = ctx.lock_index() {
-                warn!("Failed to clone index: {err}");
+                warn!("Failed to clone index: {err:#}");
             };
         }
     });
diff --git a/src/controllers/github/secret_scanning.rs b/src/controllers/github/secret_scanning.rs
index 5c65bbf19cc..e846c47d41b 100644
--- a/src/controllers/github/secret_scanning.rs
+++ b/src/controllers/github/secret_scanning.rs
@@ -166,7 +166,7 @@ async fn alert_revoke_token(
         let result = send_trustpub_notification_emails(&actual_crate_ids, alert, ctx, conn).await;
         if let Err(error) = result {
             warn!(
-                "Failed to send trusted publishing token exposure notifications for crates {actual_crate_ids:?}: {error}",
+                "Failed to send trusted publishing token exposure notifications for crates {actual_crate_ids:?}: {error:#}",
             );
         }
 
@@ -209,7 +209,7 @@ async fn alert_revoke_token(
     if let Err(error) = send_notification_email(&token, alert, ctx, conn).await {
         warn!(
             token_id = %token.id, user_id = %token.user_id,
-            "Failed to send email notification: {error}",
+            "Failed to send email notification: {error:#}",
         )
     }
 
diff --git a/src/controllers/krate/update.rs b/src/controllers/krate/update.rs
index ab36a78e4ab..baa5bd1d081 100644
--- a/src/controllers/krate/update.rs
+++ b/src/controllers/krate/update.rs
@@ -142,7 +142,7 @@ async fn update_inner(
                 };
 
                 if let Err(err) = email.send(ctx, email_address).await {
-                    warn!("Failed to send trustpub_only notification to {email_address}: {err}");
+                    warn!("Failed to send trustpub_only notification to {email_address}: {err:#}");
                 }
             }
         }
diff --git a/src/controllers/token.rs b/src/controllers/token.rs
index fb4f0fd1386..2d51747de50 100644
--- a/src/controllers/token.rs
+++ b/src/controllers/token.rs
@@ -229,7 +229,7 @@ pub async fn create_api_token(
         // email should not cause an error response to be returned to the
         // caller.
         if let Err(e) = send_creation_email(&ctx.emails, &recipient, context).await {
-            error!("Failed to send token creation email: {e}")
+            error!("Failed to send token creation email: {e:#}")
         }
     }
 
diff --git a/src/controllers/trustpub/github_configs/create.rs b/src/controllers/trustpub/github_configs/create.rs
index 9bb66569db8..db566c2b6d9 100644
--- a/src/controllers/trustpub/github_configs/create.rs
+++ b/src/controllers/trustpub/github_configs/create.rs
@@ -101,7 +101,7 @@ pub async fn create_trustpub_github_config(
     };
     let gh_auth = encryption.decrypt(gh_auth).map_err(|err| {
         let login = &auth_user.gh_login;
-        warn!("Failed to decrypt GitHub token for user {login}: {err}");
+        warn!("Failed to decrypt GitHub token for user {login}: {err:#}");
         server_error("Internal server error")
     })?;
     let gh_auth = GitHubAuth::bearer(gh_auth);
@@ -145,7 +145,7 @@ pub async fn create_trustpub_github_config(
         };
 
         if let Err(err) = send_notification_email(&ctx, email_address, context).await {
-            warn!("Failed to send trusted publishing notification to {email_address}: {err}");
+            warn!("Failed to send trusted publishing notification to {email_address}: {err:#}");
         }
     }
 
diff --git a/src/controllers/trustpub/github_configs/delete.rs b/src/controllers/trustpub/github_configs/delete.rs
index f068181babf..7bd6860520d 100644
--- a/src/controllers/trustpub/github_configs/delete.rs
+++ b/src/controllers/trustpub/github_configs/delete.rs
@@ -93,7 +93,7 @@ pub async fn delete_trustpub_github_config(
         };
 
         if let Err(err) = send_notification_email(&ctx, email_address, context).await {
-            warn!("Failed to send trusted publishing notification to {email_address}: {err}");
+            warn!("Failed to send trusted publishing notification to {email_address}: {err:#}");
         }
     }
 
diff --git a/src/controllers/trustpub/gitlab_configs/create.rs b/src/controllers/trustpub/gitlab_configs/create.rs
index 243bd2db9e4..f69faaa9547 100644
--- a/src/controllers/trustpub/gitlab_configs/create.rs
+++ b/src/controllers/trustpub/gitlab_configs/create.rs
@@ -118,7 +118,7 @@ pub async fn create_trustpub_gitlab_config(
         };
 
         if let Err(err) = send_notification_email(&ctx, email_address, context).await {
-            warn!("Failed to send trusted publishing notification to {email_address}: {err}");
+            warn!("Failed to send trusted publishing notification to {email_address}: {err:#}");
         }
     }
 
diff --git a/src/controllers/trustpub/gitlab_configs/delete.rs b/src/controllers/trustpub/gitlab_configs/delete.rs
index cfa32930658..7996c2a0128 100644
--- a/src/controllers/trustpub/gitlab_configs/delete.rs
+++ b/src/controllers/trustpub/gitlab_configs/delete.rs
@@ -93,7 +93,7 @@ pub async fn delete_trustpub_gitlab_config(
         };
 
         if let Err(err) = send_notification_email(&ctx, email_address, context).await {
-            warn!("Failed to send trusted publishing notification to {email_address}: {err}");
+            warn!("Failed to send trusted publishing notification to {email_address}: {err:#}");
         }
     }
 
diff --git a/src/controllers/trustpub/tokens/exchange/mod.rs b/src/controllers/trustpub/tokens/exchange/mod.rs
index 011b7844f2f..dd90ebf361b 100644
--- a/src/controllers/trustpub/tokens/exchange/mod.rs
+++ b/src/controllers/trustpub/tokens/exchange/mod.rs
@@ -58,7 +58,7 @@ pub async fn exchange_trustpub_token(
             return Err(bad_request("Invalid JWT key ID"));
         }
         Err(err) => {
-            warn!("Failed to load OIDC key set: {err}");
+            warn!("Failed to load OIDC key set: {err:#}");
             return Err(server_error("Failed to load OIDC key set"));
         }
     };
diff --git a/src/db.rs b/src/db.rs
index 88775781e33..2cd8129195d 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -103,7 +103,11 @@ async fn establish_async_connection(
 
     let connector = MakeTlsConnector::new(connector);
     let result = tokio_postgres::connect(url, connector).await;
-    let (client, conn) = result.map_err(|err| BadConnection(err.to_string()))?;
+    let (client, conn) = result.map_err(|error| {
+        // Convert to anyhow so `{error:#}` includes the source chain.
+        let error = anyhow::Error::new(error);
+        BadConnection(format!("{error:#}"))
+    })?;
     AsyncPgConnection::try_from_client_and_connection(client, conn).await
 }
 
diff --git a/src/metrics/collector.rs b/src/metrics/collector.rs
index 0cab657ab96..bfa9ae2e7a8 100644
--- a/src/metrics/collector.rs
+++ b/src/metrics/collector.rs
@@ -22,7 +22,7 @@ pub fn spawn(deadpool: Pool<AsyncPgConnection>, metrics: WorkerMetrics) {
 
         loop {
             if let Err(error) = record(&deadpool, &metrics, &mut observed_queues).await {
-                warn!("Failed to record service metrics: {error}");
+                warn!("Failed to record service metrics: {error:#}");
             }
 
             tokio::time::sleep(COLLECT_INTERVAL).await;
diff --git a/src/sentry/mod.rs b/src/sentry/mod.rs
index 5e59ba0e153..00f53e60d2e 100644
--- a/src/sentry/mod.rs
+++ b/src/sentry/mod.rs
@@ -19,7 +19,7 @@ pub fn init() -> Option<ClientInitGuard> {
     let config = match SentryConfig::from_environment() {
         Ok(config) => config,
         Err(error) => {
-            warn!("Failed to read Sentry configuration from environment: {error}");
+            warn!("Failed to read Sentry configuration from environment: {error:#}");
             return None;
         }
     };
diff --git a/src/util/errors.rs b/src/util/errors.rs
index bb0231335a6..f720191de78 100644
--- a/src/util/errors.rs
+++ b/src/util/errors.rs
@@ -222,7 +222,7 @@ impl From<GitHubError> for BoxedAppError {
                      GitHub org memberships.",
             ),
             GitHubError::NotFound(_) => not_found(),
-            _ => internal(format!("didn't get a 200 result from github: {error}")),
+            _ => internal(format!("didn't get a 200 result from github: {error:#}")),
         }
     }
 }
diff --git a/src/worker/jobs/docs_rs_queue_rebuild.rs b/src/worker/jobs/docs_rs_queue_rebuild.rs
index e84677253d4..a1d3eb29452 100644
--- a/src/worker/jobs/docs_rs_queue_rebuild.rs
+++ b/src/worker/jobs/docs_rs_queue_rebuild.rs
@@ -43,7 +43,7 @@ impl BackgroundJob for DocsRsQueueRebuild {
                 error!(
                     name = self.name,
                     version = self.version,
-                    "couldn't queue docs rebuild. won't retry: {err}"
+                    "couldn't queue docs rebuild. won't retry: {err:#}"
                 );
                 Ok(())
             }
diff --git a/src/worker/jobs/dump_db.rs b/src/worker/jobs/dump_db.rs
index b1c2a433f59..a70d11329fa 100644
--- a/src/worker/jobs/dump_db.rs
+++ b/src/worker/jobs/dump_db.rs
@@ -73,7 +73,7 @@ impl BackgroundJob for DumpDb {
         let dist = CloudFrontDistribution::Static;
 
         if let Err(error) = ctx.invalidate_cdns(&conn, dist, &tar_key.cdn_path()).await {
-            warn!("Failed to invalidate CDN caches: {error}");
+            warn!("Failed to invalidate CDN caches: {error:#}");
         }
 
         info!("Uploading zip file…");
@@ -88,7 +88,7 @@ impl BackgroundJob for DumpDb {
 
         info!("Invalidating CDN caches…");
         if let Err(error) = ctx.invalidate_cdns(&conn, dist, &zip_key.cdn_path()).await {
-            warn!("Failed to invalidate CDN caches: {error}");
+            warn!("Failed to invalidate CDN caches: {error:#}");
         }
 
         Ok(())
diff --git a/src/worker/jobs/generate_og_image.rs b/src/worker/jobs/generate_og_image.rs
index 14ba2bb4fe1..a7788b9407d 100644
--- a/src/worker/jobs/generate_og_image.rs
+++ b/src/worker/jobs/generate_og_image.rs
@@ -109,7 +109,9 @@ impl BackgroundJob for GenerateOgImage {
             && let Some(cdn_domain) = &ctx.config.storage.cdn_prefix
             && let Err(error) = fastly.purge_both_domains(cdn_domain, &og_image_path).await
         {
-            warn!("Failed to invalidate Fastly CDN for {crate_name}: {error}");
+            // Convert to anyhow so `{error:#}` includes the source chain.
+            let error = anyhow::Error::new(error);
+            warn!("Failed to invalidate Fastly CDN for {crate_name}: {error:#}");
         }
 
         info!("CDN invalidation completed for crate {crate_name}");
diff --git a/src/worker/jobs/index/sync.rs b/src/worker/jobs/index/sync.rs
index 8e0c76957b2..cca66c7ef91 100644
--- a/src/worker/jobs/index/sync.rs
+++ b/src/worker/jobs/index/sync.rs
@@ -202,9 +202,11 @@ impl BackgroundJob for SyncToSparseIndex {
 
             for domain in domains {
                 if let Err(error) = fastly.purge(&domain, &path).await {
+                    // Convert to anyhow so `{error:#}` includes the source chain.
+                    let error = anyhow::Error::new(error);
                     warn!(
                         domain,
-                        path, "Failed to invalidate sparse index on Fastly: {error}"
+                        path, "Failed to invalidate sparse index on Fastly: {error:#}"
                     );
                 }
             }
diff --git a/src/worker/jobs/index_version_downloads_archive/mod.rs b/src/worker/jobs/index_version_downloads_archive/mod.rs
index 910872f9cae..7dec943e48f 100644
--- a/src/worker/jobs/index_version_downloads_archive/mod.rs
+++ b/src/worker/jobs/index_version_downloads_archive/mod.rs
@@ -60,12 +60,12 @@ impl BackgroundJob for IndexVersionDownloadsArchive {
 
         let result = ctx.invalidate_cdns(&conn, dist, INDEX_PATH).await;
         if let Err(error) = result {
-            warn!("Failed to invalidate CDN caches: {error}");
+            warn!("Failed to invalidate CDN caches: {error:#}");
         }
 
         let result = ctx.invalidate_cdns(&conn, dist, INDEX_JSON_PATH);
         if let Err(error) = result.await {
-            warn!("Failed to invalidate CDN caches: {error}");
+            warn!("Failed to invalidate CDN caches: {error:#}");
         }
 
         info!("CDN caches invalidated");
diff --git a/src/worker/jobs/rss/mod.rs b/src/worker/jobs/rss/mod.rs
index e5fd5ddd4bf..03b063cabb3 100644
--- a/src/worker/jobs/rss/mod.rs
+++ b/src/worker/jobs/rss/mod.rs
@@ -38,7 +38,7 @@ async fn publish_channel(
 
     let dist = CloudFrontDistribution::Static;
     if let Err(error) = ctx.invalidate_cdns(conn, dist, path.as_ref()).await {
-        warn!("Failed to invalidate CDN caches: {error}");
+        warn!("Failed to invalidate CDN caches: {error:#}");
     }
 
     Ok(())
diff --git a/src/worker/jobs/typosquat.rs b/src/worker/jobs/typosquat.rs
index 29b60141b42..605b7f0ce40 100644
--- a/src/worker/jobs/typosquat.rs
+++ b/src/worker/jobs/typosquat.rs
@@ -90,7 +90,7 @@ async fn check(
                 {
                     error!(
                         ?recipient,
-                        "Failed to send possible typosquat notification: {error}"
+                        "Failed to send possible typosquat notification: {error:#}"
                     );
                 }
             }