diff --git a/crates/rspack_core/src/resolver/resolver_impl.rs b/crates/rspack_core/src/resolver/resolver_impl.rs
index 84fbf6f10955..33bd91cf5cf5 100644
--- a/crates/rspack_core/src/resolver/resolver_impl.rs
+++ b/crates/rspack_core/src/resolver/resolver_impl.rs
@@ -4,7 +4,9 @@ use std::{
   sync::Arc,
 };
 
-use rspack_error::{internal_error, Error, InternalError, Severity, TraceableError};
+use rspack_error::{
+  internal_error, DiagnosticError, Error, InternalError, Severity, TraceableError,
+};
 use rspack_loader_runner::DescriptionData;
 use sugar_path::SugarPath;
 
@@ -374,9 +376,7 @@ fn map_nodejs_resolver_error(
   plugin_driver: &SharedPluginDriver,
 ) -> ResolveError {
   match error {
-    nodejs_resolver::Error::Io(error) => {
-      ResolveError(error.to_string(), Error::Io { source: error })
-    }
+    nodejs_resolver::Error::Io(error) => ResolveError(error.to_string(), Error::from(error)),
     nodejs_resolver::Error::UnexpectedJson((json_path, error)) => ResolveError(
       format!(
         "{error:?} in {}",
@@ -423,9 +423,7 @@ fn map_oxc_resolver_error(
     }
     oxc_resolver::ResolveError::IOError(error) => ResolveError(
       "IOError".to_string(),
-      Error::Io {
-        source: error.into(),
-      },
+      Error::InternalError(DiagnosticError(error.into()).into()),
     ),
     oxc_resolver::ResolveError::Builtin(error) => ResolveError(
       format!("Builtin module: {}", error),
diff --git a/crates/rspack_error/src/diagnostic.rs b/crates/rspack_error/src/diagnostic.rs
index e439d53fe04c..b95a6128434f 100644
--- a/crates/rspack_error/src/diagnostic.rs
+++ b/crates/rspack_error/src/diagnostic.rs
@@ -137,12 +137,6 @@ impl From<Error> for Vec<Diagnostic> {
         severity,
         ..Default::default()
       },
-      Error::Io { source } => Diagnostic {
-        message: source.to_string(),
-        kind,
-        severity,
-        ..Default::default()
-      },
       Error::Anyhow { source } => Diagnostic {
         kind,
         severity,
diff --git a/crates/rspack_error/src/error.rs b/crates/rspack_error/src/error.rs
index 37de6ce2a553..62afc1f692a9 100644
--- a/crates/rspack_error/src/error.rs
+++ b/crates/rspack_error/src/error.rs
@@ -1,14 +1,21 @@
 use std::{fmt, io, path::Path};
 
-use miette::MietteDiagnostic;
+use miette::{Diagnostic, MietteDiagnostic};
 use rspack_util::swc::normalize_custom_filename;
 use swc_core::common::SourceFile;
+use thiserror::Error;
 
 use crate::{internal_error, Severity};
 
 #[derive(Debug)]
 pub struct InternalError(miette::Report);
 
+impl<T: Diagnostic + Send + Sync + 'static> From<T> for InternalError {
+  fn from(value: T) -> Self {
+    InternalError(value.into())
+  }
+}
+
 impl InternalError {
   pub fn new(error_message: String, severity: Severity) -> Self {
     Self(miette::Report::new(
@@ -147,9 +154,6 @@ impl fmt::Display for TraceableError {
 pub enum Error {
   InternalError(InternalError),
   TraceableError(TraceableError),
-  Io {
-    source: io::Error,
-  },
   Anyhow {
     source: anyhow::Error,
   },
@@ -165,7 +169,7 @@ pub enum Error {
 impl std::error::Error for Error {
   fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
     match self {
-      Error::Io { source, .. } => Some(source as &(dyn std::error::Error + 'static)),
+      // Error::Io { source, .. } => Some(source as &(dyn std::error::Error + 'static)),
       Error::Anyhow { source, .. } => Some(source.as_ref()),
       _ => None,
     }
@@ -177,7 +181,6 @@ impl fmt::Display for Error {
     match self {
       Error::InternalError(e) => write!(f, "{e}"),
       Error::TraceableError(v) => write!(f, "{v}"),
-      Error::Io { source } => write!(f, "{source}"),
       Error::Anyhow { source } => write!(f, "{source}"),
       Error::BatchErrors(errs) => write!(
         f,
@@ -205,7 +208,7 @@ impl From<serde_json::Error> for Error {
 
 impl From<io::Error> for Error {
   fn from(source: io::Error) -> Self {
-    Error::Io { source }
+    Error::InternalError(DiagnosticError(source.into()).into())
   }
 }
 
@@ -226,7 +229,6 @@ impl Error {
     match self {
       Error::InternalError(_) => DiagnosticKind::Internal,
       Error::TraceableError(TraceableError { kind, .. }) => *kind,
-      Error::Io { .. } => DiagnosticKind::Io,
       Error::Anyhow { .. } => DiagnosticKind::Internal,
       Error::BatchErrors(_) => DiagnosticKind::Internal,
       Error::Napi { .. } => DiagnosticKind::Internal,
@@ -236,7 +238,6 @@ impl Error {
     match self {
       Error::InternalError(_) => Severity::Error,
       Error::TraceableError(TraceableError { severity, .. }) => *severity,
-      Error::Io { .. } => Severity::Error,
       Error::Anyhow { .. } => Severity::Error,
       Error::BatchErrors(_) => Severity::Error,
       Error::Napi { .. } => Severity::Error,
@@ -277,3 +278,10 @@ impl std::fmt::Display for DiagnosticKind {
     }
   }
 }
+
+/// Convenience [`Diagnostic`] that can be used as an "anonymous" wrapper for
+/// Errors. This is intended to be paired with [`IntoDiagnostic`].
+#[derive(Debug, Error)]
+#[error(transparent)]
+pub struct DiagnosticError(pub Box<dyn std::error::Error + Send + Sync + 'static>);
+impl Diagnostic for DiagnosticError {}
diff --git a/crates/rspack_fs/src/error.rs b/crates/rspack_fs/src/error.rs
index 809350b564b5..81e6f2f568c2 100644
--- a/crates/rspack_fs/src/error.rs
+++ b/crates/rspack_fs/src/error.rs
@@ -16,7 +16,7 @@ impl From<std::io::Error> for Error {
 impl From<Error> for rspack_error::Error {
   fn from(value: Error) -> Self {
     match value {
-      Error::Io(err) => Self::Io { source: err },
+      Error::Io(err) => rspack_error::Error::from(err),
     }
   }
 }