diff --git a/u/uutils-coreutils/manifest.x86_64.bin b/u/uutils-coreutils/manifest.x86_64.bin
index 5723ebfa60..b02e782bd3 100644
Binary files a/u/uutils-coreutils/manifest.x86_64.bin and b/u/uutils-coreutils/manifest.x86_64.bin differ
diff --git a/u/uutils-coreutils/manifest.x86_64.jsonc b/u/uutils-coreutils/manifest.x86_64.jsonc
index 8a3595b92c..7f1695fdf1 100644
--- a/u/uutils-coreutils/manifest.x86_64.jsonc
+++ b/u/uutils-coreutils/manifest.x86_64.jsonc
@@ -657,6 +657,6 @@
 		}
 	},
 	"source-name": "uutils-coreutils",
-	"source-release": "33",
-	"source-version": "0.6.0"
+	"source-release": "34",
+	"source-version": "0.8.0"
 }
diff --git a/u/uutils-coreutils/pkg/11686.patch b/u/uutils-coreutils/pkg/11686.patch
new file mode 100644
index 0000000000..eae32a8d8f
--- /dev/null
+++ b/u/uutils-coreutils/pkg/11686.patch
@@ -0,0 +1,66 @@
+From ca6d35cc5f4a3e0508d2786cafb67146b5669475 Mon Sep 17 00:00:00 2001
+From: oech3 <79379754+oech3@users.noreply.github.com>
+Date: Tue, 7 Apr 2026 04:54:34 +0900
+Subject: [PATCH] tee: fix input with sleep
+
+---
+ src/uu/tee/src/tee.rs | 34 +++++++++++++++++++---------------
+ 1 file changed, 19 insertions(+), 15 deletions(-)
+
+diff --git a/src/uu/tee/src/tee.rs b/src/uu/tee/src/tee.rs
+index 272083b5c41..9bb4cbd8e05 100644
+--- a/src/uu/tee/src/tee.rs
++++ b/src/uu/tee/src/tee.rs
+@@ -118,33 +118,37 @@ fn copy(mut input: impl Read, mut output: impl Write) -> Result<usize> {
+     // the standard library:
+     // https://github.com/rust-lang/rust/blob/2feb91181882e525e698c4543063f4d0296fcf91/library/std/src/io/copy.rs#L271-L297
+ 
+-    // Use small buffer size from std implementation for small input
++    // Use buffer size from std implementation
+     // https://github.com/rust-lang/rust/blob/2feb91181882e525e698c4543063f4d0296fcf91/library/std/src/sys/io/mod.rs#L44
+-    const FIRST_BUF_SIZE: usize = if cfg!(target_os = "espidf") {
++    const BUF_SIZE: usize = if cfg!(target_os = "espidf") {
+         512
+     } else {
+         8 * 1024
+     };
+-    let mut buffer = [0u8; FIRST_BUF_SIZE];
++    let mut buffer = [0u8; BUF_SIZE];
+     let mut len = 0;
+-    match input.read(&mut buffer) {
+-        Ok(0) => return Ok(0),
+-        Ok(bytes_count) => {
+-            output.write_all(&buffer[0..bytes_count])?;
+-            len = bytes_count;
+-            if bytes_count < FIRST_BUF_SIZE {
++
++    loop {
++        match input.read(&mut buffer) {
++            Ok(0) => return Ok(len), // end of file
++            Ok(received) => {
++                output.write_all(&buffer[..received])?;
+                 // flush the buffer to comply with POSIX requirement that
+                 // `tee` does not buffer the input.
+                 output.flush()?;
+-                return Ok(len);
++                len += received;
++                if len > 2 * BUF_SIZE {
++                    // buffer is too small
++                    break;
++                }
+             }
++            Err(e) if e.kind() == ErrorKind::Interrupted => {}
++            Err(e) => return Err(e),
+         }
+-        Err(e) if e.kind() == ErrorKind::Interrupted => (),
+-        Err(e) => return Err(e),
+     }
+-
+-    // but optimize buffer size also for large file
+-    let mut buffer = vec![0u8; 4 * FIRST_BUF_SIZE]; //stack array makes code path for smaller file slower
++    // optimize for large input
++    //stack array makes code path for smaller file slower
++    let mut buffer = vec![0u8; 4 * BUF_SIZE];
+     loop {
+         match input.read(&mut buffer) {
+             Ok(0) => return Ok(len), // end of file
diff --git a/u/uutils-coreutils/stone.yaml b/u/uutils-coreutils/stone.yaml
index 49d6eefb10..6b4672e848 100644
--- a/u/uutils-coreutils/stone.yaml
+++ b/u/uutils-coreutils/stone.yaml
@@ -2,11 +2,11 @@
 # SPDX-License-Identifier: MPL-2.0
 
 name        : uutils-coreutils
-version     : "0.6.0"
-release     : 33
+version     : "0.8.0"
+release     : 34
 homepage    : https://uutils.github.io/coreutils/
 upstreams   :
-    - https://github.com/uutils/coreutils/archive/refs/tags/0.6.0.tar.gz : f751b8209ec05ae304941a727e42a668dcc45674986252f44d195ed43ccfad2f
+    - https://github.com/uutils/coreutils/archive/refs/tags/0.8.0.tar.gz : 03f765fd23e9cc66f8789edc6928644d8eae5e5a7962d83795739d0a8a85eaef
 summary     : Cross-platform Rust rewrite of the GNU coreutils
 description : |
     Cross-platform Rust rewrite of the GNU coreutils
@@ -22,6 +22,7 @@ environment : |
     export UUTILS_FEATURES="feat_acl,feat_systemd_logind,unix,uudoc"
     export RUSTFLAGS="$RUSTFLAGS -C codegen-units=1"
 setup       : |
+    %patch %(pkgdir)/11686.patch
     %cargo_fetch
 build       : |
     %cargo_build --features $UUTILS_FEATURES