diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index a3ab431b3..ed3c009c8 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -17,6 +17,16 @@ jobs:
     - name: cargo fmt
       run: cargo fmt -- --check
 
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: hecrj/setup-rust-action@v1
+      with:
+        rust-version: stable
+    - uses: actions/checkout@v2
+    - name: cargo clippy
+      run: cargo clippy -- -D warnings
+
   unit_tests:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -67,7 +77,7 @@ jobs:
         path: target/release/fnm.exe
 
   build_macos_release:
-    runs-on: macOS-latest
+    runs-on: macos-latest
     name: "Release build for macOS"
     steps:
     - uses: hecrj/setup-rust-action@v1
@@ -91,17 +101,23 @@ jobs:
     name: "Build static Linux binary"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Build static binary
+    - uses: hecrj/setup-rust-action@v1
+      with:
+        rust-version: stable
+        targets: x86_64-unknown-linux-musl
+    - name: Install musl tools
       run: |
-        sudo chown -R 1000:1000 .
-        docker run --rm -v "$(pwd)":/home/rust/src ekidd/rust-musl-builder:stable \
-          cargo build --target x86_64-unknown-linux-gnu --release
-        sudo chown -R $(whoami):$(whoami) .
+        sudo apt-get update
+        sudo apt-get install -y --no-install-recommends musl-tools
+    - uses: actions/checkout@v2
+    - name: Build release binary
+      run: cargo build --release --target x86_64-unknown-linux-musl
+    - name: Strip binary from debug symbols
+      run: strip target/x86_64-unknown-linux-musl/release/fnm
     - uses: actions/upload-artifact@v2
       with:
         name: fnm-linux
-        path: target/x86_64-unknown-linux-gnu/release/fnm
+        path: target/x86_64-unknown-linux-musl/release/fnm
 
   build_static_arm_binary:
     name: "Build ARM binary"
diff --git a/src/alias.rs b/src/alias.rs
index 0b2e9bdaa..14b1f6415 100644
--- a/src/alias.rs
+++ b/src/alias.rs
@@ -28,7 +28,7 @@ pub fn create_alias(
 
 pub fn list_aliases(config: &FnmConfig) -> std::io::Result<Vec<StoredAlias>> {
     let vec: Vec<_> = std::fs::read_dir(&config.aliases_dir())?
-        .filter_map(|item| item.ok())
+        .filter_map(Result::ok)
         .filter_map(|x| TryInto::<StoredAlias>::try_into(x.path().as_path()).ok())
         .collect();
     Ok(vec)
diff --git a/src/arch.rs b/src/arch.rs
index ac0e56345..64f5f6775 100644
--- a/src/arch.rs
+++ b/src/arch.rs
@@ -18,7 +18,7 @@ pub fn get_safe_arch<'a>(arch: &'a Arch, version: &Version) -> &'a Arch {
 
     return match (platform_name(), platform_arch(), version) {
         ("darwin", "arm64", Version::Semver(v)) if v.major < 16 => &Arch::X64,
-        _ => &arch,
+        _ => arch,
     };
 }
 
@@ -83,7 +83,7 @@ impl ArchError {
 }
 
 impl std::fmt::Display for ArchError {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "{}", self.details)
     }
 }
diff --git a/src/archive/zip.rs b/src/archive/zip.rs
index 502e8e768..efa0d1d47 100644
--- a/src/archive/zip.rs
+++ b/src/archive/zip.rs
@@ -33,7 +33,7 @@ impl<R: Read> Extract for Zip<R> {
 
         for i in 0..archive.len() {
             let mut file = archive.by_index(i)?;
-            let outpath = path.join(file.sanitized_name());
+            let outpath = path.join(file.mangled_name());
 
             {
                 let comment = file.comment();
diff --git a/src/choose_version_for_user_input.rs b/src/choose_version_for_user_input.rs
index 39a2c2e33..f213fdcbf 100644
--- a/src/choose_version_for_user_input.rs
+++ b/src/choose_version_for_user_input.rs
@@ -50,7 +50,7 @@ pub fn choose_version_for_user_input<'a>(
             version: Version::Alias(alias_name),
         })
     } else {
-        let current_version = requested_version.to_version(&all_versions, &config);
+        let current_version = requested_version.to_version(&all_versions, config);
         current_version.map(|version| {
             info!("Using Node {}", version.to_string().cyan());
             let path = config
diff --git a/src/commands/alias.rs b/src/commands/alias.rs
index 506ef8839..8d8ed59a2 100644
--- a/src/commands/alias.rs
+++ b/src/commands/alias.rs
@@ -25,7 +25,7 @@ impl Command for Alias {
                 version: self.to_version,
             })?;
 
-        create_alias(&config, &self.name, applicable_version.version())
+        create_alias(config, &self.name, applicable_version.version())
             .context(CantCreateSymlink)?;
 
         Ok(())
diff --git a/src/commands/current.rs b/src/commands/current.rs
index 7d2b4a065..74cb7e1fe 100644
--- a/src/commands/current.rs
+++ b/src/commands/current.rs
@@ -10,7 +10,7 @@ impl Command for Current {
     type Error = Error;
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
-        let version_string = match current_version(&config)? {
+        let version_string = match current_version(config)? {
             Some(ver) => ver.v_str(),
             None => "none".into(),
         };
diff --git a/src/commands/default.rs b/src/commands/default.rs
index 603302d8f..a24d20837 100644
--- a/src/commands/default.rs
+++ b/src/commands/default.rs
@@ -11,6 +11,7 @@ pub struct Default {
 
 impl Command for Default {
     type Error = super::alias::Error;
+
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
         Alias {
             name: "default".into(),
@@ -18,7 +19,8 @@ impl Command for Default {
         }
         .apply(config)
     }
+
     fn handle_error(err: Self::Error, config: &FnmConfig) {
-        Alias::handle_error(err, config)
+        Alias::handle_error(err, config);
     }
 }
diff --git a/src/commands/env.rs b/src/commands/env.rs
index 5173646a9..a14b15df7 100644
--- a/src/commands/env.rs
+++ b/src/commands/env.rs
@@ -54,7 +54,7 @@ impl Command for Env {
         }
 
         let shell: Box<dyn Shell> = self.shell.or_else(&infer_shell).context(CantInferShell)?;
-        let multishell_path = make_symlink(&config);
+        let multishell_path = make_symlink(config);
         let binary_path = if cfg!(windows) {
             multishell_path.clone()
         } else {
@@ -82,7 +82,7 @@ impl Command for Env {
             shell.set_env_var("FNM_ARCH", &config.arch.to_string())
         );
         if self.use_on_cd {
-            println!("{}", shell.use_on_cd(&config));
+            println!("{}", shell.use_on_cd(config));
         }
         Ok(())
     }
diff --git a/src/commands/exec.rs b/src/commands/exec.rs
index 6f1aa08e3..b07a01b81 100644
--- a/src/commands/exec.rs
+++ b/src/commands/exec.rs
@@ -40,10 +40,10 @@ impl Cmd for Exec {
                 let current_dir = std::env::current_dir().unwrap();
                 UserVersionReader::Path(current_dir)
             })
-            .to_user_version()
+            .into_user_version()
             .context(CantInferVersion)?;
 
-        let applicable_version = choose_version_for_user_input(&version, &config)
+        let applicable_version = choose_version_for_user_input(&version, config)
             .context(ApplicableVersionError)?
             .context(VersionNotFound { version })?;
 
diff --git a/src/commands/install.rs b/src/commands/install.rs
index 2a670a46a..519c4a0d5 100644
--- a/src/commands/install.rs
+++ b/src/commands/install.rs
@@ -55,7 +55,7 @@ impl super::command::Command for Install {
 
         let version = match current_version.clone() {
             UserVersion::Full(Version::Semver(actual_version)) => Version::Semver(actual_version),
-            UserVersion::Full(v @ Version::Bypassed) | UserVersion::Full(v @ Version::Alias(_)) => {
+            UserVersion::Full(v @ (Version::Bypassed | Version::Alias(_))) => {
                 ensure!(false, UninstallableVersion { version: v });
                 unreachable!();
             }
@@ -84,7 +84,7 @@ impl super::command::Command for Install {
                     .collect();
 
                 current_version
-                    .to_version(&available_versions, &config)
+                    .to_version(&available_versions, config)
                     .context(CantFindNodeVersion {
                         requested_version: current_version,
                     })?
@@ -117,12 +117,12 @@ impl super::command::Command for Install {
                 alias_name.cyan(),
                 version.v_str().cyan()
             );
-            create_alias(&config, &alias_name, &version).context(IoError)?;
+            create_alias(config, &alias_name, &version).context(IoError)?;
         }
 
         if !config.default_version_dir().exists() {
             debug!("Tagging {} as the default version", version.v_str().cyan());
-            create_alias(&config, "default", &version).context(IoError)?;
+            create_alias(config, "default", &version).context(IoError)?;
         }
 
         Ok(())
diff --git a/src/commands/ls_local.rs b/src/commands/ls_local.rs
index 673865fce..bdbb1d125 100644
--- a/src/commands/ls_local.rs
+++ b/src/commands/ls_local.rs
@@ -2,7 +2,7 @@ use crate::alias::{list_aliases, StoredAlias};
 use crate::config::FnmConfig;
 use crate::current_version::current_version;
 use crate::version::Version;
-use colored::*;
+use colored::Colorize;
 use snafu::{ResultExt, Snafu};
 use std::collections::HashMap;
 use structopt::StructOpt;
@@ -19,8 +19,8 @@ impl super::command::Command for LsLocal {
             crate::installed_versions::list(base_dir).context(CantListLocallyInstalledVersion)?;
         versions.insert(0, Version::Bypassed);
         versions.sort();
-        let aliases_hash = generate_aliases_hash(&config).context(CantReadAliases)?;
-        let curr_version = current_version(&config).ok().flatten();
+        let aliases_hash = generate_aliases_hash(config).context(CantReadAliases)?;
+        let curr_version = current_version(config).ok().flatten();
 
         for version in versions {
             let version_aliases = match aliases_hash.get(&version.v_str()) {
@@ -28,7 +28,7 @@ impl super::command::Command for LsLocal {
                 Some(versions) => {
                     let version_string = versions
                         .iter()
-                        .map(|x| x.name())
+                        .map(StoredAlias::name)
                         .collect::<Vec<_>>()
                         .join(", ");
                     format!(" {}", version_string.dimmed())
@@ -48,7 +48,7 @@ impl super::command::Command for LsLocal {
 }
 
 fn generate_aliases_hash(config: &FnmConfig) -> std::io::Result<HashMap<String, Vec<StoredAlias>>> {
-    let mut aliases = list_aliases(&config)?;
+    let mut aliases = list_aliases(config)?;
     let mut hashmap: HashMap<String, Vec<StoredAlias>> = HashMap::with_capacity(aliases.len());
     for alias in aliases.drain(..) {
         if let Some(value) = hashmap.get_mut(alias.s_ver()) {
diff --git a/src/commands/ls_remote.rs b/src/commands/ls_remote.rs
index 2c4d9f360..0cad39296 100644
--- a/src/commands/ls_remote.rs
+++ b/src/commands/ls_remote.rs
@@ -10,9 +10,7 @@ impl super::command::Command for LsRemote {
     type Error = Error;
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
-        let mut all_versions =
-            remote_node_index::list(&config.node_dist_mirror).context(HttpError)?;
-        all_versions.sort();
+        let all_versions = remote_node_index::list(&config.node_dist_mirror).context(HttpError)?;
 
         for version in all_versions {
             print!("{}", version.version);
diff --git a/src/commands/uninstall.rs b/src/commands/uninstall.rs
index 9a5abb7f6..a31c86fe2 100644
--- a/src/commands/uninstall.rs
+++ b/src/commands/uninstall.rs
@@ -37,7 +37,7 @@ impl Command for Uninstall {
 
         let available_versions: Vec<&Version> = all_versions
             .iter()
-            .filter(|v| requested_version.matches(v, &config))
+            .filter(|v| requested_version.matches(v, config))
             .collect();
 
         ensure!(
@@ -51,12 +51,12 @@ impl Command for Uninstall {
         );
 
         let version = requested_version
-            .to_version(&all_versions, &config)
+            .to_version(&all_versions, config)
             .context(CantFindVersion)?;
 
-        let matching_aliases = version.find_aliases(&config).context(IoError)?;
+        let matching_aliases = version.find_aliases(config).context(IoError)?;
         let root_path = version
-            .root_path(&config)
+            .root_path(config)
             .with_context(|| RootPathNotFound {
                 version: version.clone(),
             })?;
diff --git a/src/commands/use.rs b/src/commands/use.rs
index 5ded73ad3..f8f2049a4 100644
--- a/src/commands/use.rs
+++ b/src/commands/use.rs
@@ -24,7 +24,7 @@ impl Command for Use {
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
         let multishell_path = config.multishell_path().context(FnmEnvWasNotSourced)?;
-        warn_if_multishell_path_not_in_path_env_var(&multishell_path, &config);
+        warn_if_multishell_path_not_in_path_env_var(multishell_path, config);
 
         let all_versions =
             installed_versions::list(config.installations_dir()).context(VersionListingError)?;
@@ -34,7 +34,7 @@ impl Command for Use {
                 let current_dir = std::env::current_dir().unwrap();
                 UserVersionReader::Path(current_dir)
             })
-            .to_user_version()
+            .into_user_version()
             .context(CantInferVersion)?;
 
         let version_path = if let UserVersion::Full(Version::Bypassed) = requested_version {
@@ -50,23 +50,20 @@ impl Command for Use {
                 return Ok(());
             }
         } else {
-            let current_version = requested_version.to_version(&all_versions, &config);
-            match current_version {
-                Some(version) => {
-                    outln!(config#Info, "Using Node {}", version.to_string().cyan());
-                    config
-                        .installations_dir()
-                        .join(version.to_string())
-                        .join("installation")
-                }
-                None => {
-                    install_new_version(requested_version, config, self.install_if_missing)?;
-                    return Ok(());
-                }
+            let current_version = requested_version.to_version(&all_versions, config);
+            if let Some(version) = current_version {
+                outln!(config#Info, "Using Node {}", version.to_string().cyan());
+                config
+                    .installations_dir()
+                    .join(version.to_string())
+                    .join("installation")
+            } else {
+                install_new_version(requested_version, config, self.install_if_missing)?;
+                return Ok(());
             }
         };
 
-        replace_symlink(&version_path, &multishell_path).context(SymlinkingCreationIssue)?;
+        replace_symlink(&version_path, multishell_path).context(SymlinkingCreationIssue)?;
 
         Ok(())
     }
@@ -86,7 +83,7 @@ fn install_new_version(
 
     Install {
         version: Some(requested_version.clone()),
-        ..Default::default()
+        ..Install::default()
     }
     .apply(config)
     .context(InstallError)?;
@@ -97,7 +94,7 @@ fn install_new_version(
     }
     .apply(config)?;
 
-    return Ok(());
+    Ok(())
 }
 
 /// Tries to delete `from`, and then tries to symlink `from` to `to` anyway.
@@ -115,11 +112,12 @@ fn replace_symlink(from: &std::path::Path, to: &std::path::Path) -> std::io::Res
 }
 
 fn should_install_interactively(requested_version: &UserVersion) -> bool {
+    use std::io::Write;
+
     if !(atty::is(atty::Stream::Stdout) && atty::is(atty::Stream::Stdin)) {
         return false;
     }
 
-    use std::io::Write;
     let error_message = format!(
         "Can't find an installed Node version matching {}.",
         requested_version.to_string().italic()
@@ -146,7 +144,7 @@ fn warn_if_multishell_path_not_in_path_env_var(
         multishell_path.to_path_buf()
     };
 
-    for path in std::env::split_paths(&std::env::var("PATH").unwrap_or(String::new())) {
+    for path in std::env::split_paths(&std::env::var("PATH").unwrap_or_default()) {
         if bin_path == path {
             return;
         }
diff --git a/src/config.rs b/src/config.rs
index e680cc9b9..f23619eea 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,4 +1,4 @@
-use crate::arch;
+use crate::arch::Arch;
 use crate::log_level::LogLevel;
 use crate::path_ext::PathExt;
 use dirs::home_dir;
@@ -57,7 +57,7 @@ pub struct FnmConfig {
         global = true,
         hide_env_values = true
     )]
-    pub arch: arch::Arch,
+    pub arch: Arch,
 }
 
 impl Default for FnmConfig {
@@ -67,7 +67,7 @@ impl Default for FnmConfig {
             base_dir: None,
             multishell_path: None,
             log_level: LogLevel::Info,
-            arch: Default::default(),
+            arch: Arch::default(),
         }
     }
 }
@@ -112,10 +112,4 @@ impl FnmConfig {
         self.base_dir = base_dir;
         self
     }
-
-    pub fn multishell_base_dir(&self) -> std::path::PathBuf {
-        std::env::temp_dir()
-            .join("fnm_multishell")
-            .ensure_exists_silently()
-    }
 }
diff --git a/src/directory_portal.rs b/src/directory_portal.rs
index 458a732aa..a55879547 100644
--- a/src/directory_portal.rs
+++ b/src/directory_portal.rs
@@ -1,4 +1,4 @@
-use log::*;
+use log::debug;
 use std::path::Path;
 use tempfile::TempDir;
 
@@ -19,7 +19,7 @@ impl<P: AsRef<Path>> DirectoryPortal<P> {
     pub fn new_in(parent_dir: impl AsRef<Path>, target: P) -> Self {
         let temp_dir = TempDir::new_in(parent_dir).expect("Can't generate a temp directory");
         debug!("Created a temp directory in {:?}", temp_dir.path());
-        Self { target, temp_dir }
+        Self { temp_dir, target }
     }
 
     pub fn teleport(self) -> std::io::Result<P> {
diff --git a/src/installed_versions.rs b/src/installed_versions.rs
index cb2ca43b3..4d875c355 100644
--- a/src/installed_versions.rs
+++ b/src/installed_versions.rs
@@ -9,8 +9,7 @@ pub fn list<P: AsRef<Path>>(installations_dir: P) -> Result<Vec<Version>, Error>
         if entry
             .file_name()
             .to_str()
-            .map(|s| s.starts_with("."))
-            .unwrap_or(false)
+            .map_or(false, |s| s.starts_with('.'))
         {
             continue;
         }
diff --git a/src/log_level.rs b/src/log_level.rs
index ad27e0de2..8580deb37 100644
--- a/src/log_level.rs
+++ b/src/log_level.rs
@@ -8,10 +8,7 @@ pub enum LogLevel {
 impl LogLevel {
     pub fn is_writable(&self, logging: &Self) -> bool {
         use std::cmp::Ordering;
-        match self.cmp(logging) {
-            Ordering::Greater | Ordering::Equal => true,
-            _ => false,
-        }
+        matches!(self.cmp(logging), Ordering::Greater | Ordering::Equal)
     }
 
     pub fn writer_for(&self, logging: &Self) -> Box<dyn std::io::Write> {
@@ -30,12 +27,12 @@ impl LogLevel {
     }
 }
 
-impl Into<&'static str> for LogLevel {
-    fn into(self) -> &'static str {
-        match self {
-            Self::Quiet => "quiet",
-            Self::Info => "info",
-            Self::Error => "error",
+impl From<LogLevel> for &'static str {
+    fn from(level: LogLevel) -> Self {
+        match level {
+            LogLevel::Quiet => "quiet",
+            LogLevel::Info => "info",
+            LogLevel::Error => "error",
         }
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 78470bb4f..9af4badd5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,11 @@
+#![warn(rust_2018_idioms, clippy::all, clippy::pedantic)]
+#![allow(
+    clippy::enum_variant_names,
+    clippy::large_enum_variant,
+    clippy::module_name_repetitions,
+    clippy::similar_names
+)]
+
 mod alias;
 mod arch;
 mod archive;
diff --git a/src/remote_node_index.rs b/src/remote_node_index.rs
index c60dfba7f..e4e083aec 100644
--- a/src/remote_node_index.rs
+++ b/src/remote_node_index.rs
@@ -15,11 +15,11 @@ mod lts_status {
         Yes(String),
     }
 
-    impl Into<Option<String>> for LtsStatus {
-        fn into(self) -> Option<String> {
-            match self {
-                Self::Nope(_) => None,
-                Self::Yes(x) => Some(x),
+    impl From<LtsStatus> for Option<String> {
+        fn from(status: LtsStatus) -> Self {
+            match status {
+                LtsStatus::Nope(_) => None,
+                LtsStatus::Yes(x) => Some(x),
             }
         }
     }
@@ -60,7 +60,7 @@ mod lts_status {
     }
 }
 
-#[derive(Deserialize, Debug, Eq, Ord)]
+#[derive(Deserialize, Debug)]
 pub struct IndexedNodeVersion {
     pub version: Version,
     #[serde(with = "lts_status")]
@@ -69,18 +69,6 @@ pub struct IndexedNodeVersion {
     pub files: Vec<String>,
 }
 
-impl PartialEq for IndexedNodeVersion {
-    fn eq(&self, other: &Self) -> bool {
-        self.version.eq(&other.version)
-    }
-}
-
-impl PartialOrd for IndexedNodeVersion {
-    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
-        self.version.partial_cmp(&other.version)
-    }
-}
-
 /// Prints
 ///
 /// ```rust
@@ -111,7 +99,7 @@ pub fn list(base_url: &Url) -> Result<Vec<IndexedNodeVersion>, ureq::Error> {
         )
     })?;
 
-    value.sort();
+    value.sort_by(|a, b| a.version.cmp(&b.version));
     Ok(value)
 }
 
diff --git a/src/shell/bash.rs b/src/shell/bash.rs
index 427c6846a..9589e5ac0 100644
--- a/src/shell/bash.rs
+++ b/src/shell/bash.rs
@@ -1,16 +1,16 @@
 use super::shell::Shell;
 use indoc::indoc;
-use std::path::PathBuf;
+use std::path::Path;
 
 #[derive(Debug)]
 pub struct Bash;
 
 impl Shell for Bash {
-    fn into_structopt_shell(&self) -> structopt::clap::Shell {
+    fn to_structopt_shell(&self) -> structopt::clap::Shell {
         structopt::clap::Shell::Bash
     }
 
-    fn path(&self, path: &PathBuf) -> String {
+    fn path(&self, path: &Path) -> String {
         format!("export PATH={:?}:$PATH", path.to_str().unwrap())
     }
 
diff --git a/src/shell/fish.rs b/src/shell/fish.rs
index 7c5e41dd4..0d08af2e1 100644
--- a/src/shell/fish.rs
+++ b/src/shell/fish.rs
@@ -1,16 +1,16 @@
 use super::shell::Shell;
 use indoc::indoc;
-use std::path::PathBuf;
+use std::path::Path;
 
 #[derive(Debug)]
 pub struct Fish;
 
 impl Shell for Fish {
-    fn into_structopt_shell(&self) -> structopt::clap::Shell {
+    fn to_structopt_shell(&self) -> structopt::clap::Shell {
         structopt::clap::Shell::Fish
     }
 
-    fn path(&self, path: &PathBuf) -> String {
+    fn path(&self, path: &Path) -> String {
         format!("set -gx PATH {:?} $PATH;", path.to_str().unwrap())
     }
 
diff --git a/src/shell/infer/unix.rs b/src/shell/infer/unix.rs
index 5463d6a7e..323a03e7c 100644
--- a/src/shell/infer/unix.rs
+++ b/src/shell/infer/unix.rs
@@ -73,7 +73,7 @@ fn get_process_info(pid: u32) -> std::io::Result<ProcessInfo> {
         .expect("Can't read the command from ps, should be the second item in the table");
 
     Ok(ProcessInfo {
-        parent_pid: u32::from_str_radix(ppid, 10).ok(),
+        parent_pid: ppid.parse().ok(),
         command: command.into(),
     })
 }
diff --git a/src/shell/powershell.rs b/src/shell/powershell.rs
index dfe44cb4f..9603e6fa4 100644
--- a/src/shell/powershell.rs
+++ b/src/shell/powershell.rs
@@ -1,11 +1,12 @@
 use super::Shell;
 use indoc::indoc;
+use std::path::Path;
 
 #[derive(Debug)]
 pub struct PowerShell;
 
 impl Shell for PowerShell {
-    fn path(&self, path: &std::path::PathBuf) -> String {
+    fn path(&self, path: &Path) -> String {
         let current_path = std::env::var_os("PATH").expect("Can't read PATH env var");
         let mut split_paths: Vec<_> = std::env::split_paths(&current_path).collect();
         split_paths.insert(0, path.to_path_buf());
@@ -27,7 +28,7 @@ impl Shell for PowerShell {
             Set-FnmOnLoad
         "#).into()
     }
-    fn into_structopt_shell(&self) -> clap::Shell {
+    fn to_structopt_shell(&self) -> clap::Shell {
         clap::Shell::PowerShell
     }
 }
diff --git a/src/shell/shell.rs b/src/shell/shell.rs
index 7239e5f13..f1071ae74 100644
--- a/src/shell/shell.rs
+++ b/src/shell/shell.rs
@@ -1,11 +1,11 @@
 use std::fmt::Debug;
-use std::path::PathBuf;
+use std::path::Path;
 
 pub trait Shell: Debug {
-    fn path(&self, path: &PathBuf) -> String;
+    fn path(&self, path: &Path) -> String;
     fn set_env_var(&self, name: &str, value: &str) -> String;
     fn use_on_cd(&self, config: &crate::config::FnmConfig) -> String;
-    fn into_structopt_shell(&self) -> structopt::clap::Shell;
+    fn to_structopt_shell(&self) -> structopt::clap::Shell;
 }
 
 #[cfg(windows)]
@@ -29,8 +29,8 @@ impl std::str::FromStr for Box<dyn Shell> {
     }
 }
 
-impl Into<structopt::clap::Shell> for Box<dyn Shell> {
-    fn into(self) -> structopt::clap::Shell {
-        self.into_structopt_shell()
+impl From<Box<dyn Shell>> for structopt::clap::Shell {
+    fn from(shell: Box<dyn Shell>) -> Self {
+        shell.to_structopt_shell()
     }
 }
diff --git a/src/shell/windows_cmd/mod.rs b/src/shell/windows_cmd/mod.rs
index 9377d5862..f1f6d4c44 100644
--- a/src/shell/windows_cmd/mod.rs
+++ b/src/shell/windows_cmd/mod.rs
@@ -1,15 +1,15 @@
 use super::shell::Shell;
-use std::path::PathBuf;
+use std::path::Path;
 
 #[derive(Debug)]
 pub struct WindowsCmd;
 
 impl Shell for WindowsCmd {
-    fn into_structopt_shell(&self) -> structopt::clap::Shell {
+    fn to_structopt_shell(&self) -> structopt::clap::Shell {
         panic!("Shell completion is not supported for Windows Command Prompt. Maybe try using PowerShell for a better experience?");
     }
 
-    fn path(&self, path: &PathBuf) -> String {
+    fn path(&self, path: &Path) -> String {
         let current_path = std::env::var_os("path").expect("Can't read PATH env var");
         let mut split_paths: Vec<_> = std::env::split_paths(&current_path).collect();
         split_paths.insert(0, path.to_path_buf());
diff --git a/src/shell/zsh.rs b/src/shell/zsh.rs
index c79a89a02..679be1f40 100644
--- a/src/shell/zsh.rs
+++ b/src/shell/zsh.rs
@@ -1,16 +1,16 @@
 use super::shell::Shell;
 use indoc::indoc;
-use std::path::PathBuf;
+use std::path::Path;
 
 #[derive(Debug)]
 pub struct Zsh;
 
 impl Shell for Zsh {
-    fn into_structopt_shell(&self) -> structopt::clap::Shell {
+    fn to_structopt_shell(&self) -> structopt::clap::Shell {
         structopt::clap::Shell::Zsh
     }
 
-    fn path(&self, path: &PathBuf) -> String {
+    fn path(&self, path: &Path) -> String {
         format!("export PATH={:?}:$PATH", path.to_str().unwrap())
     }
 
diff --git a/src/user_version.rs b/src/user_version.rs
index 5e0a220cd..1e08618da 100644
--- a/src/user_version.rs
+++ b/src/user_version.rs
@@ -34,17 +34,14 @@ impl UserVersion {
         match (self, version) {
             (Self::Full(a), b) if a == b => true,
             (Self::Full(user_version), maybe_alias) => {
-                match (user_version.alias_name(), maybe_alias.find_aliases(&config)) {
+                match (user_version.alias_name(), maybe_alias.find_aliases(config)) {
                     (None, _) | (_, Err(_)) => false,
-                    (Some(user_alias), Ok(aliases)) => aliases
-                        .iter()
-                        .find(|alias| alias.name() == user_alias)
-                        .is_some(),
+                    (Some(user_alias), Ok(aliases)) => {
+                        aliases.iter().any(|alias| alias.name() == user_alias)
+                    }
                 }
             }
-            (_, Version::Bypassed) => false,
-            (_, Version::Lts(_)) => false,
-            (_, Version::Alias(_)) => false,
+            (_, Version::Bypassed | Version::Lts(_) | Version::Alias(_)) => false,
             (Self::OnlyMajor(major), Version::Semver(other)) => *major == other.major,
             (Self::MajorMinor(major, minor), Version::Semver(other)) => {
                 *major == other.major && *minor == other.minor
@@ -69,11 +66,7 @@ impl std::fmt::Display for UserVersion {
 }
 
 fn skip_first_v(str: &str) -> &str {
-    if str.starts_with('v') {
-        &str[1..]
-    } else {
-        str
-    }
+    str.strip_prefix('v').unwrap_or(str)
 }
 
 impl FromStr for UserVersion {
@@ -96,12 +89,10 @@ impl FromStr for UserVersion {
 #[cfg(test)]
 impl PartialEq for UserVersion {
     fn eq(&self, other: &Self) -> bool {
-        use UserVersion::*;
-
         match (self, other) {
-            (OnlyMajor(a), OnlyMajor(b)) if a == b => true,
-            (MajorMinor(a1, a2), MajorMinor(b1, b2)) if (a1, a2) == (b1, b2) => true,
-            (Full(v1), Full(v2)) if v1 == v2 => true,
+            (Self::OnlyMajor(a), Self::OnlyMajor(b)) if a == b => true,
+            (Self::MajorMinor(a1, a2), Self::MajorMinor(b1, b2)) if (a1, a2) == (b1, b2) => true,
+            (Self::Full(v1), Self::Full(v2)) if v1 == v2 => true,
             (_, _) => false,
         }
     }
@@ -109,6 +100,8 @@ impl PartialEq for UserVersion {
 
 #[cfg(test)]
 mod tests {
+    use crate::config::FnmConfig;
+
     use super::*;
 
     #[test]
@@ -138,7 +131,7 @@ mod tests {
             expected.clone(),
             Version::parse("7.0.1").unwrap(),
         ];
-        let result = UserVersion::OnlyMajor(6).to_version(&versions, &Default::default());
+        let result = UserVersion::OnlyMajor(6).to_version(&versions, &FnmConfig::default());
 
         assert_eq!(result, Some(&expected));
     }
@@ -152,7 +145,7 @@ mod tests {
             expected.clone(),
             Version::parse("7.0.1").unwrap(),
         ];
-        let result = UserVersion::MajorMinor(6, 0).to_version(&versions, &Default::default());
+        let result = UserVersion::MajorMinor(6, 0).to_version(&versions, &FnmConfig::default());
 
         assert_eq!(result, Some(&expected));
     }
@@ -166,7 +159,8 @@ mod tests {
             Version::parse("6.0.1").unwrap(),
             Version::parse("7.0.1").unwrap(),
         ];
-        let result = UserVersion::Full(expected.clone()).to_version(&versions, &Default::default());
+        let result =
+            UserVersion::Full(expected.clone()).to_version(&versions, &FnmConfig::default());
 
         assert_eq!(result, Some(&expected));
     }
diff --git a/src/user_version_reader.rs b/src/user_version_reader.rs
index 7a1cc5366..78ab0ee36 100644
--- a/src/user_version_reader.rs
+++ b/src/user_version_reader.rs
@@ -10,7 +10,7 @@ pub enum UserVersionReader {
 }
 
 impl UserVersionReader {
-    pub fn to_user_version(self) -> Option<UserVersion> {
+    pub fn into_user_version(self) -> Option<UserVersion> {
         match self {
             Self::Direct(uv) => Some(uv),
             Self::Path(pathbuf) if pathbuf.is_file() => get_user_version_for_file(&pathbuf),
@@ -23,8 +23,8 @@ impl FromStr for UserVersionReader {
     type Err = semver::Error;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let pathbuf = PathBuf::from_str(&s);
-        let user_version = UserVersion::from_str(&s);
+        let pathbuf = PathBuf::from_str(s);
+        let user_version = UserVersion::from_str(s);
         match (user_version, pathbuf) {
             (_, Ok(pathbuf)) if pathbuf.exists() => Ok(Self::Path(pathbuf)),
             (Ok(user_version), _) => Ok(Self::Direct(user_version)),
@@ -47,7 +47,7 @@ mod tests {
         write!(file, "14").unwrap();
         let pathbuf = file.path().to_path_buf();
 
-        let user_version = UserVersionReader::Path(pathbuf).to_user_version();
+        let user_version = UserVersionReader::Path(pathbuf).into_user_version();
         assert_eq!(user_version, Some(UserVersion::OnlyMajor(14)));
     }
 
@@ -58,13 +58,14 @@ mod tests {
         std::fs::write(node_version_path, "14").unwrap();
         let pathbuf = directory.path().to_path_buf();
 
-        let user_version = UserVersionReader::Path(pathbuf).to_user_version();
+        let user_version = UserVersionReader::Path(pathbuf).into_user_version();
         assert_eq!(user_version, Some(UserVersion::OnlyMajor(14)));
     }
 
     #[test]
     fn test_direct_to_version() {
-        let user_version = UserVersionReader::Direct(UserVersion::OnlyMajor(14)).to_user_version();
+        let user_version =
+            UserVersionReader::Direct(UserVersion::OnlyMajor(14)).into_user_version();
         assert_eq!(user_version, Some(UserVersion::OnlyMajor(14)));
     }
 
diff --git a/src/version.rs b/src/version.rs
index 4a1da232b..da86bb031 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -12,7 +12,7 @@ pub enum Version {
 }
 
 fn first_letter_is_number(s: &str) -> bool {
-    s.chars().next().map(|x| x.is_digit(10)).unwrap_or(false)
+    s.chars().next().map_or(false, |x| x.is_digit(10))
 }
 
 impl Version {
@@ -25,7 +25,7 @@ impl Version {
             Ok(Self::Lts(lts_type))
         } else if first_letter_is_number(lowercased.trim_start_matches('v')) {
             let version_plain = lowercased.trim_start_matches('v');
-            let sver = semver::Version::parse(&version_plain)?;
+            let sver = semver::Version::parse(version_plain)?;
             Ok(Self::Semver(sver))
         } else {
             Ok(Self::Alias(lowercased))
@@ -34,8 +34,7 @@ impl Version {
 
     pub fn alias_name(&self) -> Option<String> {
         match self {
-            l @ Self::Lts(_) => Some(l.v_str()),
-            l @ Self::Alias(_) => Some(l.v_str()),
+            l @ (Self::Lts(_) | Self::Alias(_)) => Some(l.v_str()),
             _ => None,
         }
     }
@@ -44,7 +43,7 @@ impl Version {
         &self,
         config: &config::FnmConfig,
     ) -> std::io::Result<Vec<alias::StoredAlias>> {
-        let aliases = alias::list_aliases(&config)?
+        let aliases = alias::list_aliases(config)?
             .drain(..)
             .filter(|alias| alias.s_ver() == self.v_str())
             .collect();
@@ -58,7 +57,7 @@ impl Version {
     pub fn installation_path(&self, config: &config::FnmConfig) -> Option<std::path::PathBuf> {
         match self {
             Self::Bypassed => None,
-            v @ Self::Lts(_) | v @ Self::Alias(_) => {
+            v @ (Self::Lts(_) | Self::Alias(_)) => {
                 Some(config.aliases_dir().join(v.alias_name().unwrap()))
             }
             v @ Self::Semver(_) => Some(
@@ -71,7 +70,7 @@ impl Version {
     }
 
     pub fn root_path(&self, config: &config::FnmConfig) -> Option<std::path::PathBuf> {
-        match self.installation_path(&config) {
+        match self.installation_path(config) {
             None => None,
             Some(path) => {
                 let mut canon_path = path.canonicalize().ok()?;
diff --git a/src/version_files.rs b/src/version_files.rs
index c5bf3084b..4d0bbea76 100644
--- a/src/version_files.rs
+++ b/src/version_files.rs
@@ -10,7 +10,7 @@ const PATH_PARTS: [&str; 2] = [".nvmrc", ".node-version"];
 pub fn get_user_version_for_directory(path: impl AsRef<Path>) -> Option<UserVersion> {
     let path = path.as_ref();
 
-    for path_part in PATH_PARTS.iter() {
+    for path_part in &PATH_PARTS {
         let new_path = path.join(path_part);
         info!(
             "Looking for version file in {}. exists? {}",
diff --git a/tests/shellcode/call.rs b/tests/shellcode/call.rs
index abe5b1235..2f45b792a 100644
--- a/tests/shellcode/call.rs
+++ b/tests/shellcode/call.rs
@@ -4,16 +4,13 @@ use std::fmt::Write;
 
 #[derive(Debug)]
 pub(crate) struct Call {
-    binary: Box<&'static str>,
+    binary: &'static str,
     args: Vec<&'static str>,
 }
 
 impl Call {
     pub(crate) fn new(binary: &'static str, args: Vec<&'static str>) -> Self {
-        Self {
-            binary: Box::from(binary),
-            args,
-        }
+        Self { binary, args }
     }
 }
 
diff --git a/tests/shellcode/line_separated_expressions.rs b/tests/shellcode/line_separated_expressions.rs
index 6ef1cc154..b944cfdbf 100644
--- a/tests/shellcode/line_separated_expressions.rs
+++ b/tests/shellcode/line_separated_expressions.rs
@@ -38,7 +38,7 @@ impl<S: Shell, A: Expression<S>, B: Expression<S>> Expression<S>
 {
     fn write_shell(&self, writer: &mut impl Write) -> std::fmt::Result {
         self.a.write_shell(writer)?;
-        write!(writer, "\n")?;
+        writeln!(writer)?;
         self.b.write_shell(writer)
     }
 }
diff --git a/tests/shellcode/mod.rs b/tests/shellcode/mod.rs
index d55540d4d..c6ab55ffe 100644
--- a/tests/shellcode/mod.rs
+++ b/tests/shellcode/mod.rs
@@ -81,7 +81,7 @@ macro_rules! test_shell {
         $(
             #[test]
             #[serial_test::serial]
-            #[allow(non_snake_case)]
+            #[allow(non_snake_case, clippy::redundant_closure_call)]
             fn $shell() {
                 use super::*;
                 #[allow(unused)]