diff --git a/.cargo/config b/.cargo/config
new file mode 100644
index 0000000..d8c2032
--- /dev/null
+++ b/.cargo/config
@@ -0,0 +1,2 @@
+[alias]
+xtask = "run --manifest-path ./xtask/Cargo.toml --"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ba95a67..284fe2f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,4 +21,4 @@ jobs:
         if: ${{ matrix.os != 'windows-latest' }}
         with:
           nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/20.09.tar.gz
-      - run: make test
+      - run: cargo xtask ci --nix ${{ matrix.os != 'windows-latest' }}
diff --git a/Makefile b/Makefile
deleted file mode 100644
index a45c1b0..0000000
--- a/Makefile
+++ /dev/null
@@ -1,39 +0,0 @@
-ifeq ($(CI), true)
-	ci_color_always := --color=always
-endif
-
-ifeq ($(OS), Windows_NT)
-	NIX := false
-else
-	NIX := true
-endif
-
-.PHONY: build clean install test uninstall
-
-build:
-	cargo build $(ci_color_always)
-
-clean:
-	cargo clean $(ci_color_always)
-
-install:
-	cargo install --path=. $(ci_color_always)
-
-ifeq ($(NIX), true)
-test:
-	nix-shell --pure --run 'cargo fmt -- --check --files-with-diff $(ci_color_always)'
-	nix-shell --pure --run 'cargo check --all-features $(ci_color_always)'
-	nix-shell --pure --run 'cargo clippy --all-features $(ci_color_always) -- --deny warnings --deny clippy::all'
-	nix-shell --pure --run 'cargo test --all-features --no-fail-fast $(ci_color_always)'
-	nix-shell --pure --run 'cargo audit --deny warnings $(ci_color_always)'
-else
-test:
-	cargo fmt -- --check --files-with-diff $(ci_color_always)
-	cargo check --all-features $(ci_color_always)
-	cargo clippy --all-features $(ci_color_always) -- --deny warnings --deny clippy::all
-	cargo test --no-fail-fast $(ci_color_always)
-	cargo audit --deny warnings $(ci_color_always)
-endif
-
-uninstall:
-	cargo uninstall $(ci_color_always)
diff --git a/rustfmt.toml b/rustfmt.toml
index 1e7bc52..c007369 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,5 +1,6 @@
 # group_imports = "StdExternalCrate"
 # imports_granularity = "Module"
+max_width = 120
 newline_style = "Native"
 use_field_init_shorthand = true
 use_small_heuristics = "Max"
diff --git a/src/app/_app.rs b/src/app/_app.rs
index cf7a0de..32859c6 100644
--- a/src/app/_app.rs
+++ b/src/app/_app.rs
@@ -10,7 +10,7 @@ const ENV_HELP: &str = "ENVIRONMENT VARIABLES:
     _ZO_MAXAGE              Maximum total age after which entries start getting deleted
     _ZO_RESOLVE_SYMLINKS    Resolve symlinks when storing paths";
 
-#[derive(Debug, Clap)]
+#[derive(Clap, Debug)]
 #[clap(
     bin_name = env!("CARGO_PKG_NAME"),
     about,
diff --git a/src/app/add.rs b/src/app/add.rs
index c735f19..6a63f0d 100644
--- a/src/app/add.rs
+++ b/src/app/add.rs
@@ -22,11 +22,7 @@ impl Run for Add {
         let mut db = db.open()?;
 
         for path in &self.paths {
-            let path = if config::resolve_symlinks() {
-                util::canonicalize(path)
-            } else {
-                util::resolve_path(path)
-            }?;
+            let path = if config::resolve_symlinks() { util::canonicalize(path) } else { util::resolve_path(path) }?;
             let path = util::path_to_str(&path)?;
 
             // Ignore path if it contains unsupported characters, or if it's in
diff --git a/src/app/import.rs b/src/app/import.rs
index 2b23749..b1f573b 100644
--- a/src/app/import.rs
+++ b/src/app/import.rs
@@ -8,9 +8,8 @@ use std::fs;
 
 impl Run for Import {
     fn run(&self) -> Result<()> {
-        let buffer = fs::read_to_string(&self.path).with_context(|| {
-            format!("could not open database for importing: {}", &self.path.display())
-        })?;
+        let buffer = fs::read_to_string(&self.path)
+            .with_context(|| format!("could not open database for importing: {}", &self.path.display()))?;
 
         let data_dir = config::data_dir()?;
         let mut db = DatabaseFile::new(data_dir);
@@ -64,8 +63,7 @@ fn from_z<'a>(db: &mut Database<'a>, buffer: &'a str) -> Result<()> {
         let mut split = line.rsplitn(3, '|');
 
         let last_accessed = split.next().with_context(|| format!("invalid entry: {}", line))?;
-        let last_accessed =
-            last_accessed.parse().with_context(|| format!("invalid epoch: {}", last_accessed))?;
+        let last_accessed = last_accessed.parse().with_context(|| format!("invalid epoch: {}", last_accessed))?;
 
         let rank = split.next().with_context(|| format!("invalid entry: {}", line))?;
         let rank = rank.parse().with_context(|| format!("invalid rank: {}", rank))?;
diff --git a/src/config.rs b/src/config.rs
index 1a71785..9854fd3 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -45,8 +45,7 @@ pub fn exclude_dirs() -> Result<Vec<Pattern>> {
             env::split_paths(&paths)
                 .map(|path| {
                     let pattern = path.to_str().context("invalid unicode in _ZO_EXCLUDE_DIRS")?;
-                    Pattern::new(pattern)
-                        .with_context(|| format!("invalid glob in _ZO_EXCLUDE_DIRS: {}", pattern))
+                    Pattern::new(pattern).with_context(|| format!("invalid glob in _ZO_EXCLUDE_DIRS: {}", pattern))
                 })
                 .collect()
         },
@@ -61,9 +60,8 @@ pub fn maxage() -> Result<Rank> {
     match env::var_os("_ZO_MAXAGE") {
         Some(maxage) => {
             let maxage = maxage.to_str().context("invalid unicode in _ZO_MAXAGE")?;
-            let maxage = maxage
-                .parse::<u64>()
-                .with_context(|| format!("unable to parse _ZO_MAXAGE as integer: {}", maxage))?;
+            let maxage =
+                maxage.parse::<u64>().with_context(|| format!("unable to parse _ZO_MAXAGE as integer: {}", maxage))?;
             Ok(maxage as Rank)
         }
         None => Ok(10000.0),
diff --git a/src/db/mod.rs b/src/db/mod.rs
index ba2b712..da49e52 100644
--- a/src/db/mod.rs
+++ b/src/db/mod.rs
@@ -25,21 +25,18 @@ impl<'file> Database<'file> {
         }
 
         let buffer = self.dirs.to_bytes()?;
-        let mut file = NamedTempFile::new_in(self.data_dir).with_context(|| {
-            format!("could not create temporary database in: {}", self.data_dir.display())
-        })?;
+        let mut file = NamedTempFile::new_in(self.data_dir)
+            .with_context(|| format!("could not create temporary database in: {}", self.data_dir.display()))?;
 
         // Preallocate enough space on the file, preventing copying later on.
         // This optimization may fail on some filesystems, but it is safe to
         // ignore it and proceed.
         let _ = file.as_file().set_len(buffer.len() as _);
-        file.write_all(&buffer).with_context(|| {
-            format!("could not write to temporary database: {}", file.path().display())
-        })?;
+        file.write_all(&buffer)
+            .with_context(|| format!("could not write to temporary database: {}", file.path().display()))?;
 
         let path = db_path(&self.data_dir);
-        persist(file, &path)
-            .with_context(|| format!("could not replace database: {}", path.display()))?;
+        persist(file, &path).with_context(|| format!("could not replace database: {}", path.display()))?;
 
         self.modified = false;
         Ok(())
@@ -51,11 +48,7 @@ impl<'file> Database<'file> {
 
         match self.dirs.iter_mut().find(|dir| dir.path == path) {
             None => {
-                self.dirs.push(Dir {
-                    path: path.to_string().into(),
-                    last_accessed: now,
-                    rank: 1.0,
-                });
+                self.dirs.push(Dir { path: path.to_string().into(), last_accessed: now, rank: 1.0 });
             }
             Some(dir) => {
                 dir.last_accessed = now;
@@ -184,23 +177,19 @@ impl DatabaseFile {
         match fs::read(&path) {
             Ok(buffer) => {
                 self.buffer = buffer;
-                let dirs = DirList::from_bytes(&self.buffer).with_context(|| {
-                    format!("could not deserialize database: {}", path.display())
-                })?;
+                let dirs = DirList::from_bytes(&self.buffer)
+                    .with_context(|| format!("could not deserialize database: {}", path.display()))?;
                 Ok(Database { dirs, modified: false, data_dir: &self.data_dir })
             }
             Err(e) if e.kind() == io::ErrorKind::NotFound => {
                 // Create data directory, but don't create any file yet.
                 // The file will be created later by [`Database::save`]
                 // if any data is modified.
-                fs::create_dir_all(&self.data_dir).with_context(|| {
-                    format!("unable to create data directory: {}", self.data_dir.display())
-                })?;
+                fs::create_dir_all(&self.data_dir)
+                    .with_context(|| format!("unable to create data directory: {}", self.data_dir.display()))?;
                 Ok(Database { dirs: DirList::new(), modified: false, data_dir: &self.data_dir })
             }
-            Err(e) => {
-                Err(e).with_context(|| format!("could not read from database: {}", path.display()))
-            }
+            Err(e) => Err(e).with_context(|| format!("could not read from database: {}", path.display())),
         }
     }
 }
diff --git a/src/db/stream.rs b/src/db/stream.rs
index 5386dab..6811c09 100644
--- a/src/db/stream.rs
+++ b/src/db/stream.rs
@@ -151,8 +151,7 @@ mod tests {
     #[case(&["/foo/", "/bar"], "/foo/bar", false)]
     #[case(&["/foo/", "/bar"], "/foo/baz/bar", true)]
     fn query(#[case] keywords: &[&str], #[case] path: &str, #[case] is_match: bool) {
-        let mut db =
-            Database { dirs: Vec::new().into(), modified: false, data_dir: &PathBuf::new() };
+        let mut db = Database { dirs: Vec::new().into(), modified: false, data_dir: &PathBuf::new() };
         let stream = db.stream(0).with_keywords(keywords);
         assert_eq!(is_match, stream.matches_keywords(path));
     }
diff --git a/src/shell.rs b/src/shell.rs
index 1bb4eb7..6765e7e 100644
--- a/src/shell.rs
+++ b/src/shell.rs
@@ -50,13 +50,7 @@ mod tests {
     ) {
         let opts = Opts { cmd, hook, echo, resolve_symlinks };
         let source = Bash(&opts).render().unwrap();
-
-        Command::new("bash")
-            .args(&["--noprofile", "--norc", "-c", &source])
-            .assert()
-            .success()
-            .stdout("")
-            .stderr("");
+        Command::new("bash").args(&["--noprofile", "--norc", "-c", &source]).assert().success().stdout("").stderr("");
     }
 
     #[rstest]
@@ -110,19 +104,12 @@ mod tests {
 
         // Filter out lines using edit:*, since those functions
         // are only available in the interactive editor.
-        for line in
-            Elvish(&opts).render().unwrap().split('\n').filter(|line| !line.contains("edit:"))
-        {
+        for line in Elvish(&opts).render().unwrap().split('\n').filter(|line| !line.contains("edit:")) {
             source.push_str(line);
             source.push('\n');
         }
 
-        Command::new("elvish")
-            .args(&["-c", &source, "-norc"])
-            .assert()
-            .success()
-            .stdout("")
-            .stderr("");
+        Command::new("elvish").args(&["-c", &source, "-norc"]).assert().success().stdout("").stderr("");
     }
 
     #[rstest]
@@ -184,12 +171,8 @@ mod tests {
         let tempdir = tempfile::tempdir().unwrap();
         let tempdir = tempdir.path().to_str().unwrap();
 
-        let assert = Command::new("nu")
-            .env("HOME", tempdir)
-            .args(&["--commands", &source])
-            .assert()
-            .success()
-            .stderr("");
+        let assert =
+            Command::new("nu").env("HOME", tempdir).args(&["--commands", &source]).assert().success().stderr("");
 
         if opts.hook != InitHook::Pwd {
             assert.stdout("");
@@ -302,12 +285,7 @@ mod tests {
         let mut source = Xonsh(&opts).render().unwrap();
         source.push('\n');
 
-        Command::new("black")
-            .args(&["--check", "--diff", "-"])
-            .write_stdin(source)
-            .assert()
-            .success()
-            .stdout("");
+        Command::new("black").args(&["--check", "--diff", "-"]).write_stdin(source).assert().success().stdout("");
     }
 
     #[rstest]
diff --git a/src/util.rs b/src/util.rs
index a2635e3..6eb7e46 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -7,8 +7,7 @@ use std::path::{Component, Path, PathBuf};
 use std::time::SystemTime;
 
 pub fn canonicalize<P: AsRef<Path>>(path: &P) -> Result<PathBuf> {
-    dunce::canonicalize(path)
-        .with_context(|| format!("could not resolve path: {}", path.as_ref().display()))
+    dunce::canonicalize(path).with_context(|| format!("could not resolve path: {}", path.as_ref().display()))
 }
 
 pub fn current_dir() -> Result<PathBuf> {
@@ -16,10 +15,8 @@ pub fn current_dir() -> Result<PathBuf> {
 }
 
 pub fn current_time() -> Result<Epoch> {
-    let current_time = SystemTime::now()
-        .duration_since(SystemTime::UNIX_EPOCH)
-        .context("system clock set to invalid time")?
-        .as_secs();
+    let current_time =
+        SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).context("system clock set to invalid time")?.as_secs();
 
     Ok(current_time)
 }
@@ -51,9 +48,7 @@ pub fn resolve_path<P: AsRef<Path>>(path: &P) -> Result<PathBuf> {
 
             match components.next() {
                 Some(Component::Prefix(prefix)) => match prefix.kind() {
-                    Prefix::Disk(drive_letter) | Prefix::VerbatimDisk(drive_letter) => {
-                        Some(drive_letter)
-                    }
+                    Prefix::Disk(drive_letter) | Prefix::VerbatimDisk(drive_letter) => Some(drive_letter),
                     _ => None,
                 },
                 _ => None,
@@ -106,9 +101,8 @@ pub fn resolve_path<P: AsRef<Path>>(path: &P) -> Result<PathBuf> {
                 components.next();
 
                 let current_dir = env::current_dir()?;
-                let drive_letter = get_drive_letter(&current_dir).with_context(|| {
-                    format!("could not get drive letter: {}", current_dir.display())
-                })?;
+                let drive_letter = get_drive_letter(&current_dir)
+                    .with_context(|| format!("could not get drive letter: {}", current_dir.display()))?;
                 base_path = get_drive_path(drive_letter);
                 stack.extend(base_path.components());
             }
diff --git a/tests/completion.rs b/tests/completion.rs
index 118e18e..f7c6c4c 100644
--- a/tests/completion.rs
+++ b/tests/completion.rs
@@ -6,12 +6,7 @@ use assert_cmd::Command;
 #[test]
 fn completions_bash() {
     let source = include_str!("../contrib/completions/zoxide.bash");
-    Command::new("bash")
-        .args(&["--noprofile", "--norc", "-c", source])
-        .assert()
-        .success()
-        .stdout("")
-        .stderr("");
+    Command::new("bash").args(&["--noprofile", "--norc", "-c", source]).assert().success().stdout("").stderr("");
 }
 
 // Elvish: the completions file uses editor commands to add completions to the
diff --git a/xtask/Cargo.lock b/xtask/Cargo.lock
new file mode 100644
index 0000000..c026cf8
--- /dev/null
+++ b/xtask/Cargo.lock
@@ -0,0 +1,170 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "clap"
+version = "3.0.0-beta.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcd70aa5597dbc42f7217a543f9ef2768b2ef823ba29036072d30e1d88e98406"
+dependencies = [
+ "bitflags",
+ "clap_derive",
+ "indexmap",
+ "lazy_static",
+ "os_str_bytes",
+ "textwrap",
+ "vec_map",
+]
+
+[[package]]
+name = "clap_derive"
+version = "3.0.0-beta.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b5bb0d655624a0b8770d1c178fb8ffcb1f91cc722cb08f451e3dc72465421ac"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+
+[[package]]
+name = "heck"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
+dependencies = [
+ "unicode-segmentation",
+]
+
+[[package]]
+name = "indexmap"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc633605454125dec4b66843673f01c7df2b89479b32e0ed634e43a91cff62a5"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "os_str_bytes"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6acbef58a60fe69ab50510a55bc8cdd4d6cf2283d27ad338f54cb52747a9cf2d"
+
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9f5105d4fdaab20335ca9565e106a5d9b82b6219b5ba735731124ac6711d23d"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.76"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c6f107db402c2c2055242dbf4d2af0e69197202e9faacbef9571bbe47f5a1b84"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
+[[package]]
+name = "version_check"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
+
+[[package]]
+name = "xtask"
+version = "0.1.0"
+dependencies = [
+ "clap",
+]
diff --git a/xtask/Cargo.toml b/xtask/Cargo.toml
new file mode 100644
index 0000000..5926f49
--- /dev/null
+++ b/xtask/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "xtask"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "=3.0.0-beta.4", default-features = false, features = [
+    "derive",
+    "std",
+] }
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
new file mode 100644
index 0000000..df53e81
--- /dev/null
+++ b/xtask/src/main.rs
@@ -0,0 +1,48 @@
+use clap::{ArgEnum, Clap};
+
+use std::process::Command;
+
+#[derive(Clap, Debug)]
+struct App {
+    #[clap(arg_enum)]
+    task: Task,
+    #[clap(long)]
+    nix: Option<bool>,
+}
+
+#[derive(ArgEnum, Debug)]
+enum Task {
+    CI,
+}
+
+fn run(args: &[&str], nix: bool) {
+    let args_str = args.join(" ");
+    println!(">>> {}", args_str);
+
+    let status = if nix {
+        Command::new("nix-shell").args(&["--pure", "--run", &args_str]).status()
+    } else {
+        let (cmd, args) = args.split_first().unwrap();
+        Command::new(cmd).args(args).status()
+    };
+    if !status.unwrap().success() {
+        panic!("command exited with an error");
+    }
+}
+
+fn main() {
+    let app = App::parse();
+    let color = if std::env::var_os("CI").is_some() { "--color=always" } else { "--color=auto" };
+    let nix = app.nix.unwrap_or_else(|| Command::new("nix-shell").arg("--version").output().is_ok());
+    let run = |args: &[&str]| run(args, nix);
+    match app.task {
+        Task::CI => {
+            run(&["cargo", "fmt", "--", "--check", color, "--files-with-diff"]);
+            run(&["cargo", "check", "--all-features", color]);
+            run(&["cargo", "clippy", "--all-features", color, "--", "--deny=warnings", "--deny=clippy::all"]);
+            run(&["cargo", "test", if nix { "--all-features" } else { "" }, color, "--no-fail-fast"]);
+            // color: https://github.com/rustsec/rustsec/pull/436
+            run(&["cargo", "audit", "--deny=warnings"]);
+        }
+    }
+}