diff --git a/bffhd/capnp/authenticationsystem.rs b/bffhd/capnp/authenticationsystem.rs
index 0206f2b..197b38e 100644
--- a/bffhd/capnp/authenticationsystem.rs
+++ b/bffhd/capnp/authenticationsystem.rs
@@ -113,7 +113,7 @@ impl AuthenticationSystem for Authentication {
                 f.write_char(')')
             }
         }
-        let mut response;
+        let response;
 
         let mut builder = results.get();
         if let State::Running(mut session, manager) =
diff --git a/bffhd/capnp/machine.rs b/bffhd/capnp/machine.rs
index 013b9a1..5c19139 100644
--- a/bffhd/capnp/machine.rs
+++ b/bffhd/capnp/machine.rs
@@ -178,7 +178,7 @@ impl InUseServer for Machine {
 
     fn send_raw_data(
         &mut self,
-        mut params: inuse::SendRawDataParams,
+        params: inuse::SendRawDataParams,
         _: inuse::SendRawDataResults,
     ) -> Promise<(), ::capnp::Error> {
         let data: Vec<u8> = pry!(pry!(params.get()).get_data()).to_vec();
@@ -188,7 +188,7 @@ impl InUseServer for Machine {
 }
 
 impl ProdableServer for Machine {
-    fn prod_with_data(&mut self, mut params: ProdWithDataParams, _: ProdWithDataResults) -> Promise<(), Error> {
+    fn prod_with_data(&mut self, params: ProdWithDataParams, _: ProdWithDataResults) -> Promise<(), Error> {
         let data: Vec<u8> = pry!(pry!(params.get()).get_data()).to_vec();
         self.resource.send_raw(data);
         Promise::ok(())
diff --git a/bffhd/capnp/permissionsystem.rs b/bffhd/capnp/permissionsystem.rs
index 4506aa4..de5f0aa 100644
--- a/bffhd/capnp/permissionsystem.rs
+++ b/bffhd/capnp/permissionsystem.rs
@@ -36,7 +36,7 @@ impl PermissionSystem for Permissions {
 
         tracing::trace!("method call");
         let roles = self.roles.list().collect::<Vec<&String>>();
-        let mut builder = results.get();
+        let builder = results.get();
         let mut b = builder.init_role_list(roles.len() as u32);
         for (i, role) in roles.into_iter().enumerate() {
             let mut role_builder = b.reborrow().get(i as u32);
diff --git a/bffhd/capnp/user.rs b/bffhd/capnp/user.rs
index eb5cfe1..6e88ad6 100644
--- a/bffhd/capnp/user.rs
+++ b/bffhd/capnp/user.rs
@@ -214,7 +214,7 @@ impl card_d_e_s_fire_e_v2::Server for User {
             .userdata
             .kv
             .get("cardtoken") {
-            let mut b = results.get();
+            let b = results.get();
             let mut lb = b.init_token_list(1);
             lb.set(0, tk.as_ref());
         }
diff --git a/runtime/console/src/aggregate.rs b/runtime/console/src/aggregate.rs
index 4029a1f..8379d62 100644
--- a/runtime/console/src/aggregate.rs
+++ b/runtime/console/src/aggregate.rs
@@ -7,7 +7,6 @@ use console_api::{async_ops, instrument, resources, tasks};
 use crossbeam_channel::{Receiver, TryRecvError};
 use futures_util::{FutureExt, StreamExt};
 use std::collections::HashMap;
-use std::num::NonZeroU64;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use std::time::{Duration, Instant};
diff --git a/runtime/console/src/lib.rs b/runtime/console/src/lib.rs
index c3d38af..2ecd8c8 100644
--- a/runtime/console/src/lib.rs
+++ b/runtime/console/src/lib.rs
@@ -1,5 +1,4 @@
 use crossbeam_channel::{Sender, TrySendError};
-use std::borrow::Borrow;
 use std::cell::RefCell;
 use std::net::IpAddr;
 use std::sync::atomic::{AtomicUsize, Ordering};
@@ -9,7 +8,7 @@ use thread_local::ThreadLocal;
 use tracing::span;
 use tracing_core::span::Attributes;
 use tracing_core::{Interest, Metadata, Subscriber};
-use tracing_subscriber::layer::{Context, Filter};
+use tracing_subscriber::layer::Context;
 use tracing_subscriber::registry::{LookupSpan, SpanRef};
 use tracing_subscriber::Layer;
 
diff --git a/runtime/console/src/server.rs b/runtime/console/src/server.rs
index b92e8c0..06997cd 100644
--- a/runtime/console/src/server.rs
+++ b/runtime/console/src/server.rs
@@ -4,11 +4,9 @@ use async_compat::CompatExt;
 use console_api::instrument;
 use console_api::instrument::instrument_server::{Instrument, InstrumentServer};
 use console_api::tasks;
-use futures_util::TryStreamExt;
 use std::error::Error;
-use std::future::Future;
 use std::io::IoSlice;
-use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
+use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 use std::pin::Pin;
 use std::task::{Context, Poll};
 use tokio::io::AsyncRead as TokioAsyncRead;
@@ -95,7 +93,7 @@ impl Server {
     }
 
     pub async fn serve(
-        mut self, /*, incoming: I */
+        self, /*, incoming: I */
     ) -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
         let svc = InstrumentServer::new(self);
 
diff --git a/runtime/executor/src/pool.rs b/runtime/executor/src/pool.rs
index 9686706..aa37683 100644
--- a/runtime/executor/src/pool.rs
+++ b/runtime/executor/src/pool.rs
@@ -22,9 +22,6 @@ use std::marker::PhantomData;
 use std::mem::MaybeUninit;
 use std::sync::Arc;
 use std::time::Duration;
-use tracing::field::FieldSet;
-use tracing::metadata::Kind;
-use tracing::{Instrument, Level, Span};
 
 #[derive(Debug)]
 struct Spooler<'a> {
diff --git a/runtime/executor/src/supervision.rs b/runtime/executor/src/supervision.rs
index a11cfe0..6eead88 100644
--- a/runtime/executor/src/supervision.rs
+++ b/runtime/executor/src/supervision.rs
@@ -2,7 +2,6 @@ use lightproc::GroupId;
 use once_cell::sync::OnceCell;
 use sharded_slab::pool::Ref;
 use sharded_slab::{Clear, Pool};
-use std::borrow::Borrow;
 use std::cell;
 use std::cell::RefCell;
 use std::sync::atomic::{fence, AtomicUsize, Ordering};
diff --git a/runtime/executor/src/thread_manager.rs b/runtime/executor/src/thread_manager.rs
index d8241b8..69d6b87 100644
--- a/runtime/executor/src/thread_manager.rs
+++ b/runtime/executor/src/thread_manager.rs
@@ -65,7 +65,7 @@ use std::{
     },
     thread,
 };
-use tracing::{debug, trace};
+use tracing::debug;
 
 /// The default thread park timeout before checking for new tasks.
 const THREAD_PARK_TIMEOUT: Duration = Duration::from_millis(1);