diff --git a/Cargo.lock b/Cargo.lock
index b02f7eaa905..fdd92de4e2a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2678,6 +2678,7 @@ dependencies = [
  "chrono",
  "clap",
  "glob",
+ "thiserror 2.0.11",
  "uucore",
  "windows-sys 0.59.0",
 ]
@@ -2764,6 +2765,7 @@ name = "uu_groups"
 version = "0.0.29"
 dependencies = [
  "clap",
+ "thiserror 2.0.11",
  "uucore",
 ]
 
@@ -2922,6 +2924,7 @@ dependencies = [
  "clap",
  "rand",
  "tempfile",
+ "thiserror 2.0.11",
  "uucore",
 ]
 
@@ -2973,6 +2976,7 @@ version = "0.0.29"
 dependencies = [
  "clap",
  "libc",
+ "thiserror 2.0.11",
  "uucore",
 ]
 
@@ -3346,6 +3350,7 @@ name = "uu_tsort"
 version = "0.0.29"
 dependencies = [
  "clap",
+ "thiserror 2.0.11",
  "uucore",
 ]
 
diff --git a/src/uu/du/Cargo.toml b/src/uu/du/Cargo.toml
index 27ec1700a5f..0c0f2aaad07 100644
--- a/src/uu/du/Cargo.toml
+++ b/src/uu/du/Cargo.toml
@@ -22,6 +22,7 @@ chrono = { workspace = true }
 glob = { workspace = true }
 clap = { workspace = true }
 uucore = { workspace = true, features = ["format"] }
+thiserror = { workspace = true }
 
 [target.'cfg(target_os = "windows")'.dependencies]
 windows-sys = { workspace = true, features = [
diff --git a/src/uu/du/src/du.rs b/src/uu/du/src/du.rs
index bd017f1d515..5b9017f3171 100644
--- a/src/uu/du/src/du.rs
+++ b/src/uu/du/src/du.rs
@@ -8,8 +8,6 @@ use clap::{builder::PossibleValue, crate_version, Arg, ArgAction, ArgMatches, Co
 use glob::Pattern;
 use std::collections::HashSet;
 use std::env;
-use std::error::Error;
-use std::fmt::Display;
 #[cfg(not(windows))]
 use std::fs::Metadata;
 use std::fs::{self, DirEntry, File};
@@ -25,6 +23,7 @@ use std::str::FromStr;
 use std::sync::mpsc;
 use std::thread;
 use std::time::{Duration, UNIX_EPOCH};
+use thiserror::Error;
 use uucore::display::{print_verbatim, Quotable};
 use uucore::error::{set_exit_code, FromIo, UError, UResult, USimpleError};
 use uucore::line_ending::LineEnding;
@@ -409,48 +408,26 @@ fn du(
     Ok(my_stat)
 }
 
-#[derive(Debug)]
+#[derive(Debug, Error)]
 enum DuError {
+    #[error("invalid maximum depth {depth}", depth = .0.quote())]
     InvalidMaxDepthArg(String),
+
+    #[error("summarizing conflicts with --max-depth={depth}", depth = .0.maybe_quote())]
     SummarizeDepthConflict(String),
+
+    #[error("invalid argument {style} for 'time style'\nValid arguments are:\n- 'full-iso'\n- 'long-iso'\n- 'iso'\nTry '{help}' for more information.",
+           style = .0.quote(),
+           help = uucore::execution_phrase())]
     InvalidTimeStyleArg(String),
+
+    #[error("'birth' and 'creation' arguments for --time are not supported on this platform.")]
     InvalidTimeArg,
-    InvalidGlob(String),
-}
 
-impl Display for DuError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::InvalidMaxDepthArg(s) => write!(f, "invalid maximum depth {}", s.quote()),
-            Self::SummarizeDepthConflict(s) => {
-                write!(
-                    f,
-                    "summarizing conflicts with --max-depth={}",
-                    s.maybe_quote()
-                )
-            }
-            Self::InvalidTimeStyleArg(s) => write!(
-                f,
-                "invalid argument {} for 'time style'
-Valid arguments are:
-- 'full-iso'
-- 'long-iso'
-- 'iso'
-Try '{} --help' for more information.",
-                s.quote(),
-                uucore::execution_phrase()
-            ),
-            Self::InvalidTimeArg => write!(
-                f,
-                "'birth' and 'creation' arguments for --time are not supported on this platform.",
-            ),
-            Self::InvalidGlob(s) => write!(f, "Invalid exclude syntax: {s}"),
-        }
-    }
+    #[error("Invalid exclude syntax: {0}")]
+    InvalidGlob(String),
 }
 
-impl Error for DuError {}
-
 impl UError for DuError {
     fn code(&self) -> i32 {
         match self {
diff --git a/src/uu/groups/Cargo.toml b/src/uu/groups/Cargo.toml
index 11055f529a3..51074ea2cab 100644
--- a/src/uu/groups/Cargo.toml
+++ b/src/uu/groups/Cargo.toml
@@ -18,6 +18,7 @@ path = "src/groups.rs"
 
 [dependencies]
 clap = { workspace = true }
+thiserror = { workspace = true }
 uucore = { workspace = true, features = ["entries", "process"] }
 
 [[bin]]
diff --git a/src/uu/groups/src/groups.rs b/src/uu/groups/src/groups.rs
index 0f0dfce804a..46c9a224515 100644
--- a/src/uu/groups/src/groups.rs
+++ b/src/uu/groups/src/groups.rs
@@ -2,18 +2,10 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
-//
-// ============================================================================
-// Test suite summary for GNU coreutils 8.32.162-4eda
-// ============================================================================
-// PASS: tests/misc/groups-dash.sh
-// PASS: tests/misc/groups-process-all.sh
-// PASS: tests/misc/groups-version.sh
 
 // spell-checker:ignore (ToDO) passwd
 
-use std::error::Error;
-use std::fmt::Display;
+use thiserror::Error;
 use uucore::{
     display::Quotable,
     entries::{get_groups_gnu, gid2grp, Locate, Passwd},
@@ -29,26 +21,20 @@ mod options {
 const ABOUT: &str = help_about!("groups.md");
 const USAGE: &str = help_usage!("groups.md");
 
-#[derive(Debug)]
+#[derive(Debug, Error)]
 enum GroupsError {
+    #[error("failed to fetch groups")]
     GetGroupsFailed,
+
+    #[error("cannot find name for group ID {0}")]
     GroupNotFound(u32),
+
+    #[error("{user}: no such user", user = .0.quote())]
     UserNotFound(String),
 }
 
-impl Error for GroupsError {}
 impl UError for GroupsError {}
 
-impl Display for GroupsError {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        match self {
-            Self::GetGroupsFailed => write!(f, "failed to fetch groups"),
-            Self::GroupNotFound(gid) => write!(f, "cannot find name for group ID {gid}"),
-            Self::UserNotFound(user) => write!(f, "{}: no such user", user.quote()),
-        }
-    }
-}
-
 fn infallible_gid2grp(gid: &u32) -> String {
     match gid2grp(*gid) {
         Ok(grp) => grp,
diff --git a/src/uu/mktemp/Cargo.toml b/src/uu/mktemp/Cargo.toml
index 60d0d28997b..3d7cfa04faf 100644
--- a/src/uu/mktemp/Cargo.toml
+++ b/src/uu/mktemp/Cargo.toml
@@ -20,6 +20,7 @@ path = "src/mktemp.rs"
 clap = { workspace = true }
 rand = { workspace = true }
 tempfile = { workspace = true }
+thiserror = { workspace = true }
 uucore = { workspace = true }
 
 [[bin]]
diff --git a/src/uu/mktemp/src/mktemp.rs b/src/uu/mktemp/src/mktemp.rs
index 00f23c50adc..f00ee2d7286 100644
--- a/src/uu/mktemp/src/mktemp.rs
+++ b/src/uu/mktemp/src/mktemp.rs
@@ -11,9 +11,7 @@ use uucore::error::{FromIo, UError, UResult, UUsageError};
 use uucore::{format_usage, help_about, help_usage};
 
 use std::env;
-use std::error::Error;
 use std::ffi::OsStr;
-use std::fmt::Display;
 use std::io::ErrorKind;
 use std::iter;
 use std::path::{Path, PathBuf, MAIN_SEPARATOR};
@@ -25,6 +23,7 @@ use std::os::unix::prelude::PermissionsExt;
 
 use rand::Rng;
 use tempfile::Builder;
+use thiserror::Error;
 
 const ABOUT: &str = help_about!("mktemp.md");
 const USAGE: &str = help_usage!("mktemp.md");
@@ -46,21 +45,35 @@ const TMPDIR_ENV_VAR: &str = "TMPDIR";
 #[cfg(windows)]
 const TMPDIR_ENV_VAR: &str = "TMP";
 
-#[derive(Debug)]
+#[derive(Debug, Error)]
 enum MkTempError {
+    #[error("could not persist file {path}", path = .0.quote())]
     PersistError(PathBuf),
+
+    #[error("with --suffix, template {template} must end in X", template = .0.quote())]
     MustEndInX(String),
+
+    #[error("too few X's in template {template}", template = .0.quote())]
     TooFewXs(String),
 
     /// The template prefix contains a path separator (e.g. `"a/bXXX"`).
+    #[error("invalid template, {template}, contains directory separator", template = .0.quote())]
     PrefixContainsDirSeparator(String),
 
     /// The template suffix contains a path separator (e.g. `"XXXa/b"`).
+    #[error("invalid suffix {suffix}, contains directory separator", suffix = .0.quote())]
     SuffixContainsDirSeparator(String),
+
+    #[error("invalid template, {template}; with --tmpdir, it may not be absolute", template = .0.quote())]
     InvalidTemplate(String),
+
+    #[error("too many templates")]
     TooManyTemplates,
 
     /// When a specified temporary directory could not be found.
+    #[error("failed to create {template_type} via template {template}: No such file or directory",
+            template_type = .0,
+            template = .1.quote())]
     NotFound(String, String),
 }
 
@@ -70,47 +83,6 @@ impl UError for MkTempError {
     }
 }
 
-impl Error for MkTempError {}
-
-impl Display for MkTempError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        use MkTempError::*;
-        match self {
-            PersistError(p) => write!(f, "could not persist file {}", p.quote()),
-            MustEndInX(s) => write!(f, "with --suffix, template {} must end in X", s.quote()),
-            TooFewXs(s) => write!(f, "too few X's in template {}", s.quote()),
-            PrefixContainsDirSeparator(s) => {
-                write!(
-                    f,
-                    "invalid template, {}, contains directory separator",
-                    s.quote()
-                )
-            }
-            SuffixContainsDirSeparator(s) => {
-                write!(
-                    f,
-                    "invalid suffix {}, contains directory separator",
-                    s.quote()
-                )
-            }
-            InvalidTemplate(s) => write!(
-                f,
-                "invalid template, {}; with --tmpdir, it may not be absolute",
-                s.quote()
-            ),
-            TooManyTemplates => {
-                write!(f, "too many templates")
-            }
-            NotFound(template_type, s) => write!(
-                f,
-                "failed to create {} via template {}: No such file or directory",
-                template_type,
-                s.quote()
-            ),
-        }
-    }
-}
-
 /// Options parsed from the command-line.
 ///
 /// This provides a layer of indirection between the application logic
diff --git a/src/uu/nohup/Cargo.toml b/src/uu/nohup/Cargo.toml
index df324856107..0ca725e6c59 100644
--- a/src/uu/nohup/Cargo.toml
+++ b/src/uu/nohup/Cargo.toml
@@ -20,6 +20,7 @@ path = "src/nohup.rs"
 clap = { workspace = true }
 libc = { workspace = true }
 uucore = { workspace = true, features = ["fs"] }
+thiserror = { workspace = true }
 
 [[bin]]
 name = "nohup"
diff --git a/src/uu/nohup/src/nohup.rs b/src/uu/nohup/src/nohup.rs
index 60ad979bbfe..00643d48837 100644
--- a/src/uu/nohup/src/nohup.rs
+++ b/src/uu/nohup/src/nohup.rs
@@ -10,11 +10,11 @@ use libc::{c_char, dup2, execvp, signal};
 use libc::{SIGHUP, SIG_IGN};
 use std::env;
 use std::ffi::CString;
-use std::fmt::{Display, Formatter};
 use std::fs::{File, OpenOptions};
 use std::io::{Error, IsTerminal};
 use std::os::unix::prelude::*;
 use std::path::{Path, PathBuf};
+use thiserror::Error;
 use uucore::display::Quotable;
 use uucore::error::{set_exit_code, UClapError, UError, UResult};
 use uucore::{format_usage, help_about, help_section, help_usage, show_error};
@@ -33,15 +33,24 @@ mod options {
     pub const CMD: &str = "cmd";
 }
 
-#[derive(Debug)]
+#[derive(Debug, Error)]
 enum NohupError {
+    #[error("Cannot detach from console")]
     CannotDetach,
-    CannotReplace(&'static str, std::io::Error),
-    OpenFailed(i32, std::io::Error),
-    OpenFailed2(i32, std::io::Error, String, std::io::Error),
-}
 
-impl std::error::Error for NohupError {}
+    #[error("Cannot replace {name}: {err}", name = .0, err = .1)]
+    CannotReplace(&'static str, #[source] Error),
+
+    #[error("failed to open {path}: {err}", path = NOHUP_OUT.quote(), err = .1)]
+    OpenFailed(i32, #[source] Error),
+
+    #[error("failed to open {first_path}: {first_err}\nfailed to open {second_path}: {second_err}",
+            first_path = NOHUP_OUT.quote(),
+            first_err = .1,
+            second_path = .2.quote(),
+            second_err = .3)]
+    OpenFailed2(i32, #[source] Error, String, Error),
+}
 
 impl UError for NohupError {
     fn code(&self) -> i32 {
@@ -52,26 +61,6 @@ impl UError for NohupError {
     }
 }
 
-impl Display for NohupError {
-    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
-        match self {
-            Self::CannotDetach => write!(f, "Cannot detach from console"),
-            Self::CannotReplace(s, e) => write!(f, "Cannot replace {s}: {e}"),
-            Self::OpenFailed(_, e) => {
-                write!(f, "failed to open {}: {}", NOHUP_OUT.quote(), e)
-            }
-            Self::OpenFailed2(_, e1, s, e2) => write!(
-                f,
-                "failed to open {}: {}\nfailed to open {}: {}",
-                NOHUP_OUT.quote(),
-                e1,
-                s.quote(),
-                e2
-            ),
-        }
-    }
-}
-
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let matches = uu_app().try_get_matches_from(args).with_exit_code(125)?;
diff --git a/src/uu/tsort/Cargo.toml b/src/uu/tsort/Cargo.toml
index ba53e0d7be8..77c2686a4b5 100644
--- a/src/uu/tsort/Cargo.toml
+++ b/src/uu/tsort/Cargo.toml
@@ -18,6 +18,7 @@ path = "src/tsort.rs"
 
 [dependencies]
 clap = { workspace = true }
+thiserror = { workspace = true }
 uucore = { workspace = true }
 
 [[bin]]
diff --git a/src/uu/tsort/src/tsort.rs b/src/uu/tsort/src/tsort.rs
index aac0a055fea..c051ff36451 100644
--- a/src/uu/tsort/src/tsort.rs
+++ b/src/uu/tsort/src/tsort.rs
@@ -5,8 +5,8 @@
 //spell-checker:ignore TAOCP indegree
 use clap::{crate_version, Arg, Command};
 use std::collections::{HashMap, HashSet, VecDeque};
-use std::fmt::Display;
 use std::path::Path;
+use thiserror::Error;
 use uucore::display::Quotable;
 use uucore::error::{UError, UResult};
 use uucore::{format_usage, help_about, help_usage, show};
@@ -18,43 +18,30 @@ mod options {
     pub const FILE: &str = "file";
 }
 
-#[derive(Debug)]
+#[derive(Debug, Error)]
 enum TsortError {
     /// The input file is actually a directory.
+    #[error("{0}: read error: Is a directory")]
     IsDir(String),
 
     /// The number of tokens in the input data is odd.
     ///
     /// The list of edges must be even because each edge has two
     /// components: a source node and a target node.
+    #[error("{input}: input contains an odd number of tokens", input = .0.maybe_quote())]
     NumTokensOdd(String),
 
     /// The graph contains a cycle.
+    #[error("{0}: input contains a loop:")]
     Loop(String),
 
     /// A particular node in a cycle. (This is mainly used for printing.)
+    #[error("{0}")]
     LoopNode(String),
 }
 
-impl std::error::Error for TsortError {}
-
 impl UError for TsortError {}
 
-impl Display for TsortError {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        match self {
-            Self::IsDir(d) => write!(f, "{d}: read error: Is a directory"),
-            Self::NumTokensOdd(i) => write!(
-                f,
-                "{}: input contains an odd number of tokens",
-                i.maybe_quote()
-            ),
-            Self::Loop(i) => write!(f, "{i}: input contains a loop:"),
-            Self::LoopNode(v) => write!(f, "{v}"),
-        }
-    }
-}
-
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let matches = uu_app().try_get_matches_from(args)?;