diff --git a/src/execution/dumper.rs b/src/execution/dumper.rs
index 5bd52822a..410458c95 100644
--- a/src/execution/dumper.rs
+++ b/src/execution/dumper.rs
@@ -191,10 +191,13 @@ impl<'a> Dumper<'a> {
             Vec<(value::KeyValue, serde_json::Value)>,
         > = IndexMap::new();
 
-        let mut rows_stream = import_op.executor.list(&SourceExecutorListOptions {
-            include_ordinal: false,
-            include_content_version_fp: false,
-        });
+        let mut rows_stream = import_op
+            .executor
+            .list(&SourceExecutorListOptions {
+                include_ordinal: false,
+                include_content_version_fp: false,
+            })
+            .await?;
         while let Some(rows) = rows_stream.next().await {
             for row in rows?.into_iter() {
                 let mut s = row
diff --git a/src/execution/source_indexer.rs b/src/execution/source_indexer.rs
index d9e4f6b95..2f08b79bf 100644
--- a/src/execution/source_indexer.rs
+++ b/src/execution/source_indexer.rs
@@ -414,7 +414,8 @@ impl SourceIndexingContext {
             .list(&interface::SourceExecutorListOptions {
                 include_ordinal: true,
                 include_content_version_fp: true,
-            });
+            })
+            .await?;
         self.update_with_stream(import_op, rows_stream, pool, update_stats)
             .await
     }
diff --git a/src/ops/interface.rs b/src/ops/interface.rs
index d22d42b36..3dfe88848 100644
--- a/src/ops/interface.rs
+++ b/src/ops/interface.rs
@@ -130,10 +130,10 @@ pub struct PartialSourceRowData {
 #[async_trait]
 pub trait SourceExecutor: Send + Sync {
     /// Get the list of keys for the source.
-    fn list<'a>(
-        &'a self,
-        options: &'a SourceExecutorListOptions,
-    ) -> BoxStream<'a, Result<Vec<PartialSourceRowMetadata>>>;
+    async fn list(
+        &self,
+        options: &SourceExecutorListOptions,
+    ) -> Result<BoxStream<'async_trait, Result<Vec<PartialSourceRowMetadata>>>>;
 
     // Get the value for the given key.
     async fn get_value(
diff --git a/src/ops/sources/amazon_s3.rs b/src/ops/sources/amazon_s3.rs
index 765a277c5..6ff11b98e 100644
--- a/src/ops/sources/amazon_s3.rs
+++ b/src/ops/sources/amazon_s3.rs
@@ -61,11 +61,11 @@ fn datetime_to_ordinal(dt: &aws_sdk_s3::primitives::DateTime) -> Ordinal {
 
 #[async_trait]
 impl SourceExecutor for Executor {
-    fn list<'a>(
-        &'a self,
-        _options: &'a SourceExecutorListOptions,
-    ) -> BoxStream<'a, Result<Vec<PartialSourceRowMetadata>>> {
-        try_stream! {
+    async fn list(
+        &self,
+        _options: &SourceExecutorListOptions,
+    ) -> Result<BoxStream<'async_trait, Result<Vec<PartialSourceRowMetadata>>>> {
+        let stream = try_stream! {
             let mut continuation_token = None;
             loop {
                 let mut req = self.client
@@ -104,7 +104,8 @@ impl SourceExecutor for Executor {
                     break;
                 }
             }
-        }.boxed()
+        };
+        Ok(stream.boxed())
     }
 
     async fn get_value(
diff --git a/src/ops/sources/azure_blob.rs b/src/ops/sources/azure_blob.rs
index b54e6e644..583ca3b9e 100644
--- a/src/ops/sources/azure_blob.rs
+++ b/src/ops/sources/azure_blob.rs
@@ -40,11 +40,11 @@ fn datetime_to_ordinal(dt: &time::OffsetDateTime) -> Ordinal {
 
 #[async_trait]
 impl SourceExecutor for Executor {
-    fn list<'a>(
-        &'a self,
-        _options: &'a SourceExecutorListOptions,
-    ) -> BoxStream<'a, Result<Vec<PartialSourceRowMetadata>>> {
-        try_stream! {
+    async fn list(
+        &self,
+        _options: &SourceExecutorListOptions,
+    ) -> Result<BoxStream<'async_trait, Result<Vec<PartialSourceRowMetadata>>>> {
+        let stream = try_stream! {
             let mut continuation_token: Option<NextMarker> = None;
             loop {
                 let mut list_builder = self.client
@@ -93,8 +93,8 @@ impl SourceExecutor for Executor {
                     break;
                 }
             }
-        }
-        .boxed()
+        };
+        Ok(stream.boxed())
     }
 
     async fn get_value(
diff --git a/src/ops/sources/google_drive.rs b/src/ops/sources/google_drive.rs
index 1fe0f2dd3..6f0cc8029 100644
--- a/src/ops/sources/google_drive.rs
+++ b/src/ops/sources/google_drive.rs
@@ -288,10 +288,10 @@ fn optional_modified_time(include_ordinal: bool) -> &'static str {
 
 #[async_trait]
 impl SourceExecutor for Executor {
-    fn list<'a>(
-        &'a self,
-        options: &'a SourceExecutorListOptions,
-    ) -> BoxStream<'a, Result<Vec<PartialSourceRowMetadata>>> {
+    async fn list(
+        &self,
+        options: &SourceExecutorListOptions,
+    ) -> Result<BoxStream<'async_trait, Result<Vec<PartialSourceRowMetadata>>>> {
         let mut seen_ids = HashSet::new();
         let mut folder_ids = self.root_folder_ids.clone();
         let fields = format!(
@@ -299,7 +299,7 @@ impl SourceExecutor for Executor {
             optional_modified_time(options.include_ordinal)
         );
         let mut new_folder_ids = Vec::new();
-        try_stream! {
+        let stream = try_stream! {
             while let Some(folder_id) = folder_ids.pop() {
                 let mut next_page_token = None;
                 loop {
@@ -319,8 +319,8 @@ impl SourceExecutor for Executor {
                 }
                 folder_ids.extend(new_folder_ids.drain(..).rev());
             }
-        }
-        .boxed()
+        };
+        Ok(stream.boxed())
     }
 
     async fn get_value(
diff --git a/src/ops/sources/local_file.rs b/src/ops/sources/local_file.rs
index 84f8ed18c..72b1ad38b 100644
--- a/src/ops/sources/local_file.rs
+++ b/src/ops/sources/local_file.rs
@@ -23,15 +23,15 @@ struct Executor {
 
 #[async_trait]
 impl SourceExecutor for Executor {
-    fn list<'a>(
-        &'a self,
-        options: &'a SourceExecutorListOptions,
-    ) -> BoxStream<'a, Result<Vec<PartialSourceRowMetadata>>> {
+    async fn list(
+        &self,
+        options: &SourceExecutorListOptions,
+    ) -> Result<BoxStream<'async_trait, Result<Vec<PartialSourceRowMetadata>>>> {
         let root_component_size = self.root_path.components().count();
         let mut dirs = Vec::new();
         dirs.push(Cow::Borrowed(&self.root_path));
         let mut new_dirs = Vec::new();
-        try_stream! {
+        let stream = try_stream! {
             while let Some(dir) = dirs.pop() {
                 let mut entries = tokio::fs::read_dir(dir.as_ref()).await?;
                 while let Some(entry) = entries.next_entry().await? {
@@ -64,8 +64,8 @@ impl SourceExecutor for Executor {
                 }
                 dirs.extend(new_dirs.drain(..).rev());
             }
-        }
-        .boxed()
+        };
+        Ok(stream.boxed())
     }
 
     async fn get_value(
diff --git a/src/service/flows.rs b/src/service/flows.rs
index 52839ab1d..03971a0f9 100644
--- a/src/service/flows.rs
+++ b/src/service/flows.rs
@@ -105,10 +105,13 @@ pub async fn get_keys(
             )
         })?;
 
-    let mut rows_stream = import_op.executor.list(&SourceExecutorListOptions {
-        include_ordinal: false,
-        include_content_version_fp: false,
-    });
+    let mut rows_stream = import_op
+        .executor
+        .list(&SourceExecutorListOptions {
+            include_ordinal: false,
+            include_content_version_fp: false,
+        })
+        .await?;
     let mut keys = Vec::new();
     while let Some(rows) = rows_stream.next().await {
         keys.extend(rows?.into_iter().map(|row| (row.key, row.key_aux_info)));