diff -Naur a/Cargo.toml b/Cargo.toml
--- a/Cargo.toml	2026-09-07 12:26:54.841799723 +0100
+++ b/Cargo.toml	2026-09-07 12:33:53.468365364 +0100
@@ -377,7 +377,7 @@
 clap_mangen = "0.3"
 compare = "0.1.0"
 crossterm = { version = "0.29.0", default-features = false }
-ctor = "0.6.0"
+ctor = "1"
 ctrlc = { version = "3.4.7", features = ["termination"] }
 dns-lookup = { version = "3.0.0" }
 exacl = "0.12.0"
diff -Naur a/src/uu/stdbuf/src/libstdbuf/src/libstdbuf.rs b/src/uu/stdbuf/src/libstdbuf/src/libstdbuf.rs
--- a/src/uu/stdbuf/src/libstdbuf/src/libstdbuf.rs	2026-03-08 12:06:05.000000000 +0000
+++ b/src/uu/stdbuf/src/libstdbuf/src/libstdbuf.rs	2026-09-07 12:33:53.469568688 +0100
@@ -10,7 +10,7 @@
 use std::ptr;
 
 // This runs automatically when the library is loaded via LD_PRELOAD
-#[ctor]
+#[ctor(unsafe)]
 fn init() {
     unsafe { __stdbuf() };
 }
diff -Naur a/tests/tests.rs b/tests/tests.rs
--- a/tests/tests.rs	2026-03-08 12:06:05.000000000 +0000
+++ b/tests/tests.rs	2026-09-07 12:33:53.470249399 +0100
@@ -8,7 +8,7 @@
 pub const TESTS_BINARY: &str = env!("CARGO_BIN_EXE_coreutils");
 
 // Use the ctor attribute to run this function before any tests
-#[ctor::ctor]
+#[ctor::ctor(unsafe)]
 fn init() {
     unsafe {
         // Necessary for uutests to be able to find the binary
diff -Naur a/tests/test_util_name.rs b/tests/test_util_name.rs
--- a/tests/test_util_name.rs	2026-03-08 12:06:05.000000000 +0000
+++ b/tests/test_util_name.rs	2026-09-07 12:33:53.470035116 +0100
@@ -16,7 +16,7 @@
 // Set the environment variable for any tests
 
 // Use the ctor attribute to run this function before any tests
-#[ctor::ctor]
+#[ctor::ctor(unsafe)]
 fn init() {
     // No need for unsafe here
     unsafe {
diff -Naur a/tests/test_uudoc.rs b/tests/test_uudoc.rs
--- a/tests/test_uudoc.rs	2026-03-08 12:06:05.000000000 +0000
+++ b/tests/test_uudoc.rs	2026-09-07 12:33:53.469829262 +0100
@@ -23,7 +23,7 @@
 // Set the environment variable for any tests
 
 // Use the ctor attribute to run this function before any tests
-#[ctor::ctor]
+#[ctor::ctor(unsafe)]
 fn init() {
     // No need for unsafe here
     unsafe {
diff -Naur a/tests/uutests/src/lib/util.rs b/tests/uutests/src/lib/util.rs
--- a/tests/uutests/src/lib/util.rs	2026-03-08 12:06:05.000000000 +0000
+++ b/tests/uutests/src/lib/util.rs	2026-09-07 12:33:53.470659195 +0100
@@ -3196,7 +3196,7 @@
 
     // Create a init for the test with a fake value (not needed)
     #[cfg(test)]
-    #[ctor::ctor]
+    #[ctor::ctor(unsafe)]
     fn init() {
         unsafe {
             env::set_var("UUTESTS_BINARY_PATH", "");