diff --git a/Cargo.toml b/Cargo.toml
index c681f75..3ecdc56 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ license = "LGPL-2.1"
 name = "aika"
 readme = "README.md"
 repository = "https://github.com/TheMesocarp/aika"
-version = "0.2.0"
+version = "0.2.1"
 
 
 [profile.release]
diff --git a/src/actors.rs b/src/actors.rs
index d274fe6..f5f6b37 100644
--- a/src/actors.rs
+++ b/src/actors.rs
@@ -93,7 +93,7 @@ impl<MessageType: Pod + Zeroable + Clone> Context<MessageType> {
 }
 
 /// An `Actor` is an independent logical process that belongs to a `Planet` and can schedule events.
-pub trait Actor<MessageType: Clone + Pod + Zeroable>: std::fmt::Debug {
+pub trait Actor<MessageType: Clone + Pod + Zeroable> {
     fn step(
         &mut self,
         env: &mut Context<MessageType>,
diff --git a/src/mt/engines/hlocal/cluster.rs b/src/mt/engines/hlocal/cluster.rs
index 046c2fc..40b73ad 100644
--- a/src/mt/engines/hlocal/cluster.rs
+++ b/src/mt/engines/hlocal/cluster.rs
@@ -23,7 +23,6 @@ use crate::{
     AikaError,
 };
 
-#[derive(Debug)]
 /// A `Planet` is a local simulation cluster within a `Substrate` system, owns a partition of global simulation state.
 /// It operates conservative with respect to its local actors, but allows rollbacks from causality violations
 /// triggered in inter-cluster messaging.
diff --git a/src/mt/engines/hlocal/mod.rs b/src/mt/engines/hlocal/mod.rs
index 87f86b7..e96bbd3 100644
--- a/src/mt/engines/hlocal/mod.rs
+++ b/src/mt/engines/hlocal/mod.rs
@@ -565,7 +565,8 @@ mod unit_tests {
         assert!(substrate_result.is_ok());
         assert!(
             planet_result.is_ok(),
-            "Planet run loop failed: {planet_result:?}"
+            "Planet run loop failed: {:?}",
+            planet_result.err().unwrap()
         );
         assert!(bus_result.is_ok())
     }