diff --git a/magic-nix-cache/src/api.rs b/magic-nix-cache/src/api.rs
index 9e35da6..02e4bc3 100644
--- a/magic-nix-cache/src/api.rs
+++ b/magic-nix-cache/src/api.rs
@@ -53,7 +53,8 @@ async fn workflow_finish(
 
     if let Some(attic_state) = state.flakehub_state.write().await.take() {
         tracing::info!("Waiting for FlakeHub cache uploads to finish");
-        attic_state.push_session.wait().await?;
+        let paths = attic_state.push_session.wait().await?;
+        tracing::warn!(?paths, "pushed these paths");
     }
 
     // NOTE(cole-h): see `init_logging`
@@ -78,6 +79,7 @@ pub struct EnqueuePathsRequest {
 pub struct EnqueuePathsResponse {}
 
 /// Schedule paths in the local Nix store for uploading.
+#[tracing::instrument(skip_all)]
 async fn enqueue_paths(
     Extension(state): Extension<State>,
     Json(req): Json<EnqueuePathsRequest>,
@@ -97,6 +99,7 @@ async fn enqueue_paths(
     }
 
     if let Some(flakehub_state) = &*state.flakehub_state.read().await {
+        tracing::warn!("enqueuing {:?} for flakehub", store_paths);
         crate::flakehub::enqueue_paths(flakehub_state, store_paths).await?;
     }
 
diff --git a/magic-nix-cache/src/main.rs b/magic-nix-cache/src/main.rs
index d35a27d..76446ae 100644
--- a/magic-nix-cache/src/main.rs
+++ b/magic-nix-cache/src/main.rs
@@ -20,7 +20,7 @@ mod gha;
 mod telemetry;
 
 use std::collections::HashSet;
-use std::fs::{self, create_dir_all, OpenOptions};
+use std::fs::{self, create_dir_all};
 use std::io::Write;
 use std::net::SocketAddr;
 use std::os::unix::fs::PermissionsExt;
@@ -465,7 +465,8 @@ fn init_logging() -> Result<tracing_appender::non_blocking::WorkerGuard> {
     let logfile = std::env::temp_dir().join("magic-nix-cache-tracing.log");
     let file = std::fs::OpenOptions::new()
         .create(true)
-        .append(true)
+        .write(true)
+        .truncate(true)
         .open(logfile)?;
     let (nonblocking, guard) = tracing_appender::non_blocking(file);
     let file_layer = tracing_subscriber::fmt::layer()