diff --git a/ofborg/build.rs b/ofborg/build.rs
index 677a024..4faa9ee 100644
--- a/ofborg/build.rs
+++ b/ofborg/build.rs
@@ -168,7 +168,7 @@ impl Metric {
         MetricType::Ticker(Metric {
             variant: parts.iter().cloned().collect(),
             fields: fields
-                .unwrap_or_else(|| vec![])
+                .unwrap_or_default()
                 .iter()
                 .map(|(fieldname, fieldtype)| ((*fieldname).to_string(), (*fieldtype).to_string()))
                 .collect(),
@@ -183,7 +183,7 @@ impl Metric {
         MetricType::Counter(Metric {
             variant: parts.iter().cloned().collect(),
             fields: fields
-                .unwrap_or_else(|| vec![])
+                .unwrap_or_default()
                 .iter()
                 .map(|(fieldname, fieldtype)| ((*fieldname).to_string(), (*fieldtype).to_string()))
                 .collect(),
diff --git a/ofborg/src/bin/builder.rs b/ofborg/src/bin/builder.rs
index 2a22c79..b0e45a0 100644
--- a/ofborg/src/bin/builder.rs
+++ b/ofborg/src/bin/builder.rs
@@ -44,7 +44,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     })?;
 
     let queue_name = if cfg.runner.build_all_jobs != Some(true) {
-        let queue_name = format!("build-inputs-{}", cfg.nix.system.clone());
+        let queue_name = format!("build-inputs-{}", cfg.nix.system);
         chan.declare_queue(easyamqp::QueueConfig {
             queue: queue_name.clone(),
             passive: false,
diff --git a/ofborg/src/bin/mass-rebuilder.rs b/ofborg/src/bin/mass-rebuilder.rs
index d43cca6..3919703 100644
--- a/ofborg/src/bin/mass-rebuilder.rs
+++ b/ofborg/src/bin/mass-rebuilder.rs
@@ -39,7 +39,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     let nix = cfg.nix();
 
     let events = stats::RabbitMQ::from_lapin(
-        &format!("{}-{}", cfg.runner.identity.clone(), cfg.nix.system.clone()),
+        &format!("{}-{}", cfg.runner.identity, cfg.nix.system),
         task::block_on(conn.create_channel())?,
     );
 
diff --git a/ofborg/src/bin/stats.rs b/ofborg/src/bin/stats.rs
index 1650be7..45d8158 100644
--- a/ofborg/src/bin/stats.rs
+++ b/ofborg/src/bin/stats.rs
@@ -19,7 +19,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     let mut chan = task::block_on(conn.create_channel())?;
 
     let events = stats::RabbitMQ::from_lapin(
-        &format!("{}-{}", cfg.runner.identity.clone(), cfg.nix.system.clone()),
+        &format!("{}-{}", cfg.runner.identity, cfg.nix.system),
         task::block_on(conn.create_channel())?,
     );
 
diff --git a/ofborg/src/message/buildjob.rs b/ofborg/src/message/buildjob.rs
index f9e73d7..f68bc79 100644
--- a/ofborg/src/message/buildjob.rs
+++ b/ofborg/src/message/buildjob.rs
@@ -32,7 +32,7 @@ impl BuildJob {
         statusreport: Option<ExchangeQueue>,
         request_id: String,
     ) -> BuildJob {
-        let logbackrk = format!("{}.{}", repo.full_name.clone(), pr.number,).to_lowercase();
+        let logbackrk = format!("{}.{}", repo.full_name, pr.number).to_lowercase();
 
         BuildJob {
             repo,