diff --git a/Cargo.lock b/Cargo.lock
index 2afcd9e..9afe12e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -258,7 +258,7 @@ dependencies = [
 
 [[package]]
 name = "datman"
-version = "0.5.0-alpha.1"
+version = "0.5.0-alpha.2"
 dependencies = [
  "anyhow",
  "arc-interner",
@@ -1218,7 +1218,7 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "yama"
-version = "0.5.0-alpha.1"
+version = "0.5.0-alpha.2"
 dependencies = [
  "anyhow",
  "blake",
diff --git a/datman/Cargo.toml b/datman/Cargo.toml
index f1c0a50..4d2e3f5 100644
--- a/datman/Cargo.toml
+++ b/datman/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "datman"
-version = "0.5.0-alpha.1"
+version = "0.5.0-alpha.2"
 authors = ["Olivier 'reivilibre' <olivier@librepush.net>"]
 edition = "2018"
 repository = "https://bics.ga/reivilibre/yama"
diff --git a/yama/Cargo.toml b/yama/Cargo.toml
index c8b4225..bb09dc0 100644
--- a/yama/Cargo.toml
+++ b/yama/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "yama"
-version = "0.5.0-alpha.1"
+version = "0.5.0-alpha.2"
 authors = ["Olivier 'reivilibre' <olivier@librepush.net>"]
 edition = "2018"
 description = "Deduplicated, compressed and encrypted content pile manager"
diff --git a/yama/src/operations/storing.rs b/yama/src/operations/storing.rs
index b788a9a..f9afa74 100644
--- a/yama/src/operations/storing.rs
+++ b/yama/src/operations/storing.rs
@@ -273,6 +273,8 @@ pub fn store_fully<PT: ProgressTracker>(
             progress_bar,
             num_workers,
         )?;
+        // must drop the pipeline to allow the threads to close
+        drop(pipeline);
         while let Ok(_) = control_rx.recv() {
             // TODO nothing for now.
         }
diff --git a/yama/src/pile.rs b/yama/src/pile.rs
index a2e2fb4..2bc58db 100644
--- a/yama/src/pile.rs
+++ b/yama/src/pile.rs
@@ -94,14 +94,17 @@ pub fn existence_checker_stage<RP: RawPile>(
         let next_stage = next_stage.clone();
         let rx = rx.clone();
         let pile = pile.clone();
-        std::thread::spawn(move || {
-            while let Ok((chunk_id, chunk)) = rx.recv() {
-                // TODO handle errors properly
-                if !pile.chunk_exists(&chunk_id).unwrap() {
-                    next_stage.send((chunk_id, chunk)).unwrap();
+        std::thread::Builder::new()
+            .name("yama exist?er".to_string())
+            .spawn(move || {
+                while let Ok((chunk_id, chunk)) = rx.recv() {
+                    // TODO handle errors properly
+                    if !pile.chunk_exists(&chunk_id).unwrap() {
+                        next_stage.send((chunk_id, chunk)).unwrap();
+                    }
                 }
-            }
-        });
+            })
+            .unwrap();
     }
 
     tx
diff --git a/yama/src/pile/compression.rs b/yama/src/pile/compression.rs
index b1afd9e..0675ea0 100644
--- a/yama/src/pile/compression.rs
+++ b/yama/src/pile/compression.rs
@@ -269,21 +269,24 @@ impl<R: RawPile> RawPile for RawPileCompressor<R> {
             let receiver = receiver.clone();
             let controller_send = controller_send.clone();
             let this = (*self).clone();
-            thread::spawn(move || {
-                let worker_id = Arc::new(format!("compressor-{}", compressor_number));
-                if let Err(err) = this.storage_pipeline_worker(
-                    subsequent_pipeline,
-                    receiver,
-                    worker_id.to_string(),
-                ) {
-                    controller_send
-                        .send(ControllerMessage::Failure {
-                            worker_id,
-                            error_message: format!("err {:?}", err),
-                        })
-                        .expect("This is BAD: failed to send failure message to controller.");
-                }
-            });
+            thread::Builder::new()
+                .name(format!("yama Pcomp{}", compressor_number))
+                .spawn(move || {
+                    let worker_id = Arc::new(format!("compressor-{}", compressor_number));
+                    if let Err(err) = this.storage_pipeline_worker(
+                        subsequent_pipeline,
+                        receiver,
+                        worker_id.to_string(),
+                    ) {
+                        controller_send
+                            .send(ControllerMessage::Failure {
+                                worker_id,
+                                error_message: format!("err {:?}", err),
+                            })
+                            .expect("This is BAD: failed to send failure message to controller.");
+                    }
+                })
+                .unwrap();
         }
 
         Ok(input_to_this_stage)
diff --git a/yama/src/pile/integrity.rs b/yama/src/pile/integrity.rs
index b741736..34ac52f 100644
--- a/yama/src/pile/integrity.rs
+++ b/yama/src/pile/integrity.rs
@@ -126,15 +126,18 @@ impl<RP: RawPile> RawPile for RawPileIntegrityChecker<RP> {
             .underlying
             .build_storage_pipeline(settings, controller_send)?;
         let (input, receiver) = crossbeam_channel::bounded::<(ChunkId, Vec<u8>)>(64);
-        std::thread::spawn(move || {
-            while let Ok((chunk_id, mut chunk)) = receiver.recv() {
-                let mut hasher = twox_hash::XxHash64::with_seed(XXH64_SEED);
-                hasher.write(&chunk);
-                let computed_hash = hasher.finish().to_be_bytes();
-                chunk.extend_from_slice(&computed_hash);
-                next_stage.send((chunk_id, chunk)).unwrap();
-            }
-        });
+        std::thread::Builder::new()
+            .name("yama integrity".to_string())
+            .spawn(move || {
+                while let Ok((chunk_id, mut chunk)) = receiver.recv() {
+                    let mut hasher = twox_hash::XxHash64::with_seed(XXH64_SEED);
+                    hasher.write(&chunk);
+                    let computed_hash = hasher.finish().to_be_bytes();
+                    chunk.extend_from_slice(&computed_hash);
+                    next_stage.send((chunk_id, chunk)).unwrap();
+                }
+            })
+            .unwrap();
         Ok(input)
     }
 }