diff --git a/ofborg/src/notifyworker.rs b/ofborg/src/notifyworker.rs
index 801df26..aa125be 100644
--- a/ofborg/src/notifyworker.rs
+++ b/ofborg/src/notifyworker.rs
@@ -11,7 +11,7 @@ pub struct NotifyWorker<T: SimpleNotifyWorker> {
 pub trait SimpleNotifyWorker {
     type J;
 
-    fn consumer(&self, job: &Self::J, notifier: &mut NotificationReceiver);
+    fn consumer(&self, job: &Self::J, notifier: &mut dyn NotificationReceiver);
 
     fn msg_to_job(
         &self,
diff --git a/ofborg/src/outpathdiff.rs b/ofborg/src/outpathdiff.rs
index 769b79e..b1f79af 100644
--- a/ofborg/src/outpathdiff.rs
+++ b/ofborg/src/outpathdiff.rs
@@ -110,7 +110,7 @@ type Package = String;
 type Architecture = String;
 type OutPath = String;
 
-pub fn parse_lines(data: &mut BufRead) -> PackageOutPaths {
+pub fn parse_lines(data: &mut dyn BufRead) -> PackageOutPaths {
     data.lines()
         .filter_map(|line| match line {
             Ok(line) => Some(line),
diff --git a/ofborg/src/tasks/build.rs b/ofborg/src/tasks/build.rs
index e0499bf..f5ed3d0 100644
--- a/ofborg/src/tasks/build.rs
+++ b/ofborg/src/tasks/build.rs
@@ -41,7 +41,7 @@ impl BuildWorker {
     fn actions<'a, 'b>(
         &self,
         job: &'b buildjob::BuildJob,
-        receiver: &'a mut notifyworker::NotificationReceiver,
+        receiver: &'a mut dyn notifyworker::NotificationReceiver,
     ) -> JobActions<'a, 'b> {
         JobActions::new(&self.system, &self.identity, job, receiver)
     }
@@ -50,7 +50,7 @@ impl BuildWorker {
 pub struct JobActions<'a, 'b> {
     system: String,
     identity: String,
-    receiver: &'a mut notifyworker::NotificationReceiver,
+    receiver: &'a mut dyn notifyworker::NotificationReceiver,
     job: &'b buildjob::BuildJob,
     line_counter: u64,
     snippet_log: VecDeque<String>,
@@ -66,7 +66,7 @@ impl<'a, 'b> JobActions<'a, 'b> {
         system: &str,
         identity: &str,
         job: &'b buildjob::BuildJob,
-        receiver: &'a mut notifyworker::NotificationReceiver,
+        receiver: &'a mut dyn notifyworker::NotificationReceiver,
     ) -> JobActions<'a, 'b> {
         let (log_exchange, log_routing_key) = job
             .logs
@@ -279,7 +279,7 @@ impl notifyworker::SimpleNotifyWorker for BuildWorker {
     fn consumer(
         &self,
         job: &buildjob::BuildJob,
-        notifier: &mut notifyworker::NotificationReceiver,
+        notifier: &mut dyn notifyworker::NotificationReceiver,
     ) {
         let mut actions = self.actions(&job, notifier);
 
diff --git a/ofborg/src/tasks/evaluate.rs b/ofborg/src/tasks/evaluate.rs
index 941e5ea..61f2bcf 100644
--- a/ofborg/src/tasks/evaluate.rs
+++ b/ofborg/src/tasks/evaluate.rs
@@ -156,7 +156,7 @@ impl<E: stats::SysEvents + 'static> worker::SimpleWorker for EvaluationWorker<E>
             }
         };
 
-        let mut evaluation_strategy: Box<eval::EvaluationStrategy> = if job.is_nixpkgs() {
+        let mut evaluation_strategy: Box<dyn eval::EvaluationStrategy> = if job.is_nixpkgs() {
             Box::new(eval::NixpkgsStrategy::new(
                 &job,
                 &pull,