diff --git a/src/commands.rs b/src/commands.rs
index cfdf70f057..608d97466b 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -152,7 +152,6 @@ fn run_server_process() -> Result<ServerStartup> {
     use std::ptr;
     use std::time::Duration;
     use tokio::reactor::Handle;
-    use tokio::runtime::current_thread::Runtime;
     use tokio_named_pipes::NamedPipe;
     use uuid::Uuid;
     use winapi::shared::minwindef::{DWORD, FALSE, LPVOID, TRUE};
diff --git a/src/compiler/msvc.rs b/src/compiler/msvc.rs
index b58455943c..5c26f3ceb9 100644
--- a/src/compiler/msvc.rs
+++ b/src/compiler/msvc.rs
@@ -188,7 +188,7 @@ fn encode_path(dst: &mut dyn Write, path: &Path) -> io::Result<()> {
 }
 
 #[cfg(windows)]
-fn encode_path(dst: &mut Write, path: &Path) -> io::Result<()> {
+fn encode_path(dst: &mut dyn Write, path: &Path) -> io::Result<()> {
     use std::os::windows::prelude::*;
     use local_encoding::windows::wide_char_to_multi_byte;
     use winapi::um::winnls::CP_OEMCP;
diff --git a/src/dist/mod.rs b/src/dist/mod.rs
index 0b23fec8fe..de1c660aef 100644
--- a/src/dist/mod.rs
+++ b/src/dist/mod.rs
@@ -57,7 +57,7 @@ mod path_transform {
     use std::path::{Component, Components, Path, PathBuf, Prefix, PrefixComponent};
     use std::str;
 
-    fn take_prefix<'a>(components: &'a mut Components) -> Option<PrefixComponent<'a>> {
+    fn take_prefix<'a>(components: &'a mut Components<'_>) -> Option<PrefixComponent<'a>> {
         let prefix = components.next()?;
         let pc = match prefix {
             Component::Prefix(pc) => pc,
@@ -70,7 +70,7 @@ mod path_transform {
         Some(pc)
     }
 
-    fn transform_prefix_component(pc: PrefixComponent) -> Option<String> {
+    fn transform_prefix_component(pc: PrefixComponent<'_>) -> Option<String> {
         match pc.kind() {
             // Transforming these to the same place means these may flip-flop
             // in the tracking map, but they're equivalent so not really an
diff --git a/src/util.rs b/src/util.rs
index f045c1a5e7..b197010b83 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -18,7 +18,6 @@ use futures_cpupool::CpuPool;
 use crate::mock_command::{CommandChild, RunCommand};
 use ring::digest::{Context, SHA512};
 use serde::Serialize;
-use std::env;
 use std::ffi::{OsStr, OsString};
 use std::fs::File;
 use std::hash::Hasher;
@@ -433,6 +432,7 @@ mod http_extension {
 #[cfg(not(windows))]
 pub fn daemonize() -> Result<()> {
     use daemonize::Daemonize;
+    use std::env;
     use std::mem;
 
     match env::var("SCCACHE_NO_DAEMON") {