diff --git a/src/daemon.rs b/src/daemon.rs
index 6b1848d..4272486 100644
--- a/src/daemon.rs
+++ b/src/daemon.rs
@@ -26,7 +26,7 @@ use crate::{
 
 use crate::{OwnedFdWithFlags, TokenFd};
 
-pub static UID: LazyLock<Uid> = LazyLock::new(|| rustix::process::getuid());
+pub static UID: LazyLock<Uid> = LazyLock::new(rustix::process::getuid);
 
 pub static USER_SOCKET_DIR: LazyLock<&'static Path> = LazyLock::new(|| {
     let dir: Box<Path> = env::var_os("XDG_RUNTIME_DIR")
@@ -52,19 +52,23 @@ pub enum ConvenientAttrPath {
 }
 
 impl ConvenientAttrPath {
+    /// Not currently used, but here for completeness.
+    #[expect(dead_code)]
     pub fn clone_from_dotted(s: &str) -> Self {
         Self::Dotted(Box::from(s))
     }
 
+    /// Not currently used, but here for completeness.
+    #[expect(dead_code)]
     pub fn clone_from_split(s: &[&str]) -> Self {
-        Self::from_str_iter(s.into_iter().map(Deref::deref))
+        Self::from_str_iter(s.iter().map(Deref::deref))
     }
 
     pub fn from_str_iter<'i, I>(iter: I) -> Self
     where
         I: Iterator<Item = &'i str>,
     {
-        let boxed = iter.map(|s| Box::from(s));
+        let boxed = iter.map(Box::from);
         Self::Split(Box::from_iter(boxed))
     }
 
@@ -254,10 +258,10 @@ impl Daemon {
 
         debug!("opened daemon to {:?} file descriptor {fd:?}", name);
 
-        let path = match &name {
-            Some(name) => Some(PathBuf::from(name).into_boxed_path()),
-            None => None,
-        };
+        let path = name
+            .as_ref()
+            .map(PathBuf::from)
+            .map(PathBuf::into_boxed_path);
 
         Self {
             config_path,
diff --git a/src/daemon_io.rs b/src/daemon_io.rs
index 891a518..9b319b0 100644
--- a/src/daemon_io.rs
+++ b/src/daemon_io.rs
@@ -130,7 +130,7 @@ impl From<OwnedFd> for OwnedFdWithFlags {
 
 impl Read for &OwnedFdWithFlags {
     fn read(&mut self, buf: &mut [u8]) -> Result<usize, IoError> {
-        debug_assert!(buf.len() > 0);
+        debug_assert!(!buf.is_empty());
         loop {
             buf.fill(0);
             match rustix::io::read(self.as_ref_owned(), &mut *buf) {
diff --git a/src/daemon_tokfd.rs b/src/daemon_tokfd.rs
index 05d5ec9..e00f5f2 100644
--- a/src/daemon_tokfd.rs
+++ b/src/daemon_tokfd.rs
@@ -52,7 +52,7 @@ impl FdInfo {
 
         match Self::guess_name(self.fd) {
             Ok(name) => {
-                let prev = self.name.set(Box::from(name));
+                let prev = self.name.set(name);
                 debug_assert_eq!(prev, Ok(()));
             },
             Err(e) => {
@@ -105,13 +105,14 @@ impl<'a> Display for FdInfoDisplay<'a> {
 }
 
 #[derive(Copy)]
-#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
 #[non_exhaustive]
 pub enum FdKind {
     File,
     Socket,
     SockStream,
     Poller,
+    #[default]
     Unknown,
 }
 
@@ -128,12 +129,6 @@ impl FdKind {
     }
 }
 
-impl Default for FdKind {
-    fn default() -> FdKind {
-        FdKind::Unknown
-    }
-}
-
 #[derive(Copy)]
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct TokenFd {
diff --git a/src/main.rs b/src/main.rs
index a54078e..e2c5214 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,7 +14,7 @@ use tracing_subscriber::{EnvFilter, layer::SubscriberExt};
 
 fn main_wrapped() -> Result<(), Box<dyn StdError + Send + Sync + 'static>> {
     // Default RUST_LOG to warn if it's not specified.
-    if let None = env::var_os("RUST_LOG") {
+    if env::var_os("RUST_LOG").is_none() {
         unsafe {
             env::set_var("RUST_LOG", "warn");
         }
diff --git a/src/nixcmd.rs b/src/nixcmd.rs
index 980d8a0..b5e2db5 100644
--- a/src/nixcmd.rs
+++ b/src/nixcmd.rs
@@ -5,27 +5,27 @@
 #[allow(unused_imports)]
 use crate::prelude::*;
 
-#[derive(Debug, Clone, PartialEq, Hash)]
-pub(crate) struct NixEvalExpr<E, A> {
-    pub(crate) expr: E,
-    pub(crate) attrpath: A,
-}
-
-impl<E, A> NixEvalExpr<E, A>
-where
-    E: AsRef<OsStr>,
-    A: AsRef<OsStr>,
-{
-    pub(crate) fn into_command(self) -> Command {
-        let mut cmd = Command::new("nix-instantiate");
-        cmd.arg("--eval")
-            .arg("--json")
-            .arg("--strict")
-            .arg("--expr")
-            .arg(self.expr)
-            .arg("-A")
-            .arg(self.attrpath);
-
-        cmd
-    }
-}
+//#[derive(Debug, Clone, PartialEq, Hash)]
+//pub(crate) struct NixEvalExpr<E, A> {
+//    pub(crate) expr: E,
+//    pub(crate) attrpath: A,
+//}
+//
+//impl<E, A> NixEvalExpr<E, A>
+//where
+//    E: AsRef<OsStr>,
+//    A: AsRef<OsStr>,
+//{
+//    pub(crate) fn into_command(self) -> Command {
+//        let mut cmd = Command::new("nix-instantiate");
+//        cmd.arg("--eval")
+//            .arg("--json")
+//            .arg("--strict")
+//            .arg("--expr")
+//            .arg(self.expr)
+//            .arg("-A")
+//            .arg(self.attrpath);
+//
+//        cmd
+//    }
+//}