diff --git a/lib/src/cli.rs b/lib/src/cli.rs
index af78d3dd..99d223c8 100644
--- a/lib/src/cli.rs
+++ b/lib/src/cli.rs
@@ -1097,7 +1097,7 @@ async fn run_from_opt(opt: Opt) -> Result<()> {
                     // off by default, and must be explicitly enabled.
                     no_signature_verification = !enforce_container_sigpolicy;
                     let sysroot = &if let Some(sysroot) = sysroot {
-                        ostree::Sysroot::new(Some(&gio::File::for_path(&sysroot)))
+                        ostree::Sysroot::new(Some(&gio::File::for_path(sysroot)))
                     } else {
                         ostree::Sysroot::new_default()
                     };
@@ -1118,7 +1118,7 @@ async fn run_from_opt(opt: Opt) -> Result<()> {
                         let booted_stateroot = sysroot
                             .booted_deployment()
                             .map(|d| Cow::Owned(d.osname().to_string()));
-                        booted_stateroot.unwrap_or_else(|| {
+                        booted_stateroot.unwrap_or({
                             Cow::Borrowed(crate::container::deploy::STATEROOT_DEFAULT)
                         })
                     };
diff --git a/lib/src/container/store.rs b/lib/src/container/store.rs
index ca6d1899..487960bb 100644
--- a/lib/src/container/store.rs
+++ b/lib/src/container/store.rs
@@ -376,7 +376,7 @@ pub(crate) fn parse_manifest_layout<'a>(
 
     let first_layer = manifest
         .layers()
-        .get(0)
+        .first()
         .ok_or_else(|| anyhow!("No layers in manifest"))?;
     let target_diffid = config_labels
         .and_then(|labels| labels.get(DIFFID_LABEL))
@@ -1132,7 +1132,7 @@ pub fn query_image_commit(repo: &ostree::Repo, commit: &str) -> Result<Box<Layer
         repo.read_commit_detached_metadata(&merge_commit, gio::Cancellable::NONE)?;
     let detached_commitmeta = detached_commitmeta
         .as_ref()
-        .map(|v| glib::VariantDict::new(Some(&v)));
+        .map(|v| glib::VariantDict::new(Some(v)));
     let cached_update = detached_commitmeta
         .as_ref()
         .map(parse_cached_update)
@@ -1187,9 +1187,9 @@ pub async fn copy(
             let opts = glib::VariantDict::new(None);
             let refs = [ostree_ref.as_str()];
             // Some older archives may have bindings, we don't need to verify them.
-            opts.insert("disable-verify-bindings", &true);
-            opts.insert("refs", &&refs[..]);
-            opts.insert("flags", &(flags.bits() as i32));
+            opts.insert("disable-verify-bindings", true);
+            opts.insert("refs", &refs[..]);
+            opts.insert("flags", flags.bits() as i32);
             let options = opts.to_variant();
             dest_repo.pull_with_options(srcfd, &options, None, cancellable)?;
             Ok(())
diff --git a/lib/src/container/unencapsulate.rs b/lib/src/container/unencapsulate.rs
index 99f9f9e4..55303e95 100644
--- a/lib/src/container/unencapsulate.rs
+++ b/lib/src/container/unencapsulate.rs
@@ -194,7 +194,7 @@ pub async fn unencapsulate(repo: &ostree::Repo, imgref: &OstreeImageReference) -
 /// This is implemented with a background thread using a pipe-to-self,
 /// and so there is an additional Future object returned that is a "driver"
 /// task and must also be checked for errors.
-pub(crate) fn decompress_bridge<'a>(
+pub(crate) fn decompress_bridge(
     src: impl tokio::io::AsyncBufRead + Send + Unpin + 'static,
     is_zstd: bool,
 ) -> Result<(
@@ -234,7 +234,7 @@ pub(crate) fn decompress_bridge<'a>(
 }
 
 /// Create a decompressor for this MIME type, given a stream of input.
-fn new_async_decompressor<'a>(
+fn new_async_decompressor(
     media_type: &oci_image::MediaType,
     src: impl AsyncBufRead + Send + Unpin + 'static,
 ) -> Result<(
diff --git a/lib/src/container/update_detachedmeta.rs b/lib/src/container/update_detachedmeta.rs
index 8aad8bde..f6c469e7 100644
--- a/lib/src/container/update_detachedmeta.rs
+++ b/lib/src/container/update_detachedmeta.rs
@@ -100,7 +100,7 @@ pub async fn update_detached_metadata(
 
         // Splice it into both the manifest and config
         manifest.layers_mut()[commit_layer_idx] = out_layer_descriptor;
-        config.rootfs_mut().diff_ids_mut()[commit_layer_idx] = out_layer_diffid.clone();
+        config.rootfs_mut().diff_ids_mut()[commit_layer_idx].clone_from(&out_layer_diffid);
 
         let labels = ctrcfg.labels_mut().get_or_insert_with(Default::default);
         // Nothing to do except in the special case where there's somehow only one
diff --git a/lib/src/fixture.rs b/lib/src/fixture.rs
index 2fedd446..8693f1b3 100644
--- a/lib/src/fixture.rs
+++ b/lib/src/fixture.rs
@@ -583,7 +583,9 @@ impl Fixture {
             .timestamp_opt(ostree::commit_get_timestamp(&commit) as i64, 0)
             .single()
             .unwrap();
-        let new_ts = ts.add(chrono::Duration::days(1)).timestamp() as u64;
+        let new_ts = ts
+            .add(chrono::TimeDelta::try_days(1).expect("one day does not overflow"))
+            .timestamp() as u64;
 
         // Prepare a transaction
         let tx = self.srcrepo.auto_transaction(cancellable)?;
diff --git a/lib/src/mountutil.rs b/lib/src/mountutil.rs
index 55815116..364928d9 100644
--- a/lib/src/mountutil.rs
+++ b/lib/src/mountutil.rs
@@ -21,7 +21,7 @@ fn is_mountpoint_impl_statx(root: &Dir, path: &Path) -> Result<Option<bool>> {
     ) {
         Ok(r) => {
             let present = (r.stx_attributes_mask & mountroot_flag) > 0;
-            Ok(present.then(|| r.stx_attributes & mountroot_flag > 0))
+            Ok(present.then_some(r.stx_attributes & mountroot_flag > 0))
         }
         Err(e) if e == rustix::io::Errno::NOSYS => Ok(None),
         Err(e) => Err(e.into()),
diff --git a/lib/src/ostree_manual.rs b/lib/src/ostree_manual.rs
index a4b30d13..26a12210 100644
--- a/lib/src/ostree_manual.rs
+++ b/lib/src/ostree_manual.rs
@@ -3,7 +3,6 @@
 use std::io::Read;
 use std::ptr;
 
-use ostree;
 use ostree::prelude::{Cast, InputStreamExtManual};
 use ostree::{gio, glib};
 
diff --git a/lib/src/ostree_prepareroot.rs b/lib/src/ostree_prepareroot.rs
index 1b3ee26e..1227b944 100644
--- a/lib/src/ostree_prepareroot.rs
+++ b/lib/src/ostree_prepareroot.rs
@@ -22,7 +22,7 @@ pub(crate) fn load_config(root: &ostree::RepoFile) -> Result<Option<glib::KeyFil
     let kf = glib::KeyFile::new();
     for path in ["etc", "usr/lib"].into_iter().map(Utf8Path::new) {
         let path = &path.join(CONF_PATH);
-        let f = root.resolve_relative_path(&path);
+        let f = root.resolve_relative_path(path);
         if !f.query_exists(cancellable) {
             continue;
         }
diff --git a/lib/src/tar/export.rs b/lib/src/tar/export.rs
index 43f61456..170b3c44 100644
--- a/lib/src/tar/export.rs
+++ b/lib/src/tar/export.rs
@@ -619,7 +619,7 @@ pub(crate) fn export_chunk<W: std::io::Write>(
 ) -> Result<()> {
     // For chunking, we default to format version 1
     #[allow(clippy::needless_update)]
-    let opts = ExportOptions::default();
+    let opts = ExportOptions;
     let writer = &mut OstreeTarWriter::new(repo, commit, out, opts)?;
     writer.write_repo_structure()?;
     write_chunk(writer, chunk)
@@ -633,7 +633,7 @@ pub(crate) fn export_final_chunk<W: std::io::Write>(
     remainder: chunking::Chunk,
     out: &mut tar::Builder<W>,
 ) -> Result<()> {
-    let options = ExportOptions::default();
+    let options = ExportOptions;
     let writer = &mut OstreeTarWriter::new(repo, commit_checksum, out, options)?;
     // For the final chunk, output the commit object, plus all ostree metadata objects along with
     // the containing directories.
diff --git a/lib/src/tar/import.rs b/lib/src/tar/import.rs
index 3967cf8f..a251937d 100644
--- a/lib/src/tar/import.rs
+++ b/lib/src/tar/import.rs
@@ -393,9 +393,9 @@ impl Importer {
     /// Given a tar entry that looks like an object (its path is under ostree/repo/objects/),
     /// determine its type and import it.
     #[context("Importing object {}", path)]
-    fn import_object<'b, R: std::io::Read>(
+    fn import_object<R: std::io::Read>(
         &mut self,
-        entry: tar::Entry<'b, R>,
+        entry: tar::Entry<'_, R>,
         path: &Utf8Path,
         cancellable: Option<&gio::Cancellable>,
     ) -> Result<()> {
diff --git a/lib/src/tar/write.rs b/lib/src/tar/write.rs
index 128facde..7218c54c 100644
--- a/lib/src/tar/write.rs
+++ b/lib/src/tar/write.rs
@@ -377,9 +377,10 @@ pub async fn write_tar(
     let mut child_stdout = r.stdout.take().unwrap();
     let mut child_stderr = r.stderr.take().unwrap();
     // Copy the filtered tar stream to child stdin
-    let mut import_config = TarImportConfig::default();
-    import_config.allow_nonusr = options.allow_nonusr;
-    import_config.remap_factory_var = !options.retain_var;
+    let import_config = TarImportConfig {
+        allow_nonusr: options.allow_nonusr,
+        remap_factory_var: !options.retain_var,
+    };
     let repo_tmpdir = Dir::reopen_dir(&repo.dfd_borrow())?
         .open_dir("tmp")
         .context("Getting repo tmpdir")?;
@@ -415,7 +416,7 @@ pub async fn write_tar(
                 if let Ok((_, child_stderr)) = output_copier.await {
                     // Avoid trailing newline
                     let child_stderr = child_stderr.trim();
-                    Err(e.context(format!("{child_stderr}")))?
+                    Err(e.context(child_stderr.to_string()))?
                 } else {
                     Err(e)?
                 }
diff --git a/lib/tests/it/main.rs b/lib/tests/it/main.rs
index 81444f2d..d6a01791 100644
--- a/lib/tests/it/main.rs
+++ b/lib/tests/it/main.rs
@@ -488,7 +488,7 @@ async fn impl_test_container_import_export(chunked: bool) -> Result<()> {
     let cfg = skopeo_inspect_config(&srcoci_imgref.to_string())?;
     let creation_time =
         chrono::NaiveDateTime::parse_from_str(cfg.created().as_deref().unwrap(), "%+").unwrap();
-    assert_eq!(creation_time.timestamp(), 872879442);
+    assert_eq!(creation_time.and_utc().timestamp(), 872879442);
     let found_cfg = cfg.config().as_ref().unwrap();
     // unwrap.  Unwrap.  UnWrap.  UNWRAP!!!!!!!
     assert_eq!(