Index: expectrl/Cargo.toml
===================================================================
--- expectrl.orig/Cargo.toml
+++ expectrl/Cargo.toml
@@ -43,7 +43,8 @@ version = "1.6.0"
 [features]
 
 [target."cfg(unix)".dependencies.nix]
-version = "0.26"
+version = ">= 0.27, < 1.0"
+features = ["fs", "term"]
 
 [target."cfg(unix)".dependencies.ptyprocess]
 version = "0.4.1"
Index: expectrl/src/stream/stdin.rs
===================================================================
--- expectrl.orig/src/stream/stdin.rs
+++ expectrl/src/stream/stdin.rs
@@ -1,6 +1,7 @@
 //! The module contains a nonblocking version of [std::io::Stdin].  
 
 use std::io;
+use std::os::fd::BorrowedFd;
 
 #[cfg(not(feature = "async"))]
 use std::io::Read;
@@ -153,7 +154,7 @@ mod inner {
             if isatty_terminal {
                 // tcgetattr issues error if a provided fd is not a tty,
                 // but we can work with such input as it may be redirected.
-                o_pty_flags = termios::tcgetattr(STDIN_FILENO)
+                o_pty_flags = termios::tcgetattr(unsafe { &BorrowedFd::borrow_raw(STDIN_FILENO) })
                     .map(Some)
                     .map_err(|e| Error::unknown("failed to call tcgetattr", e.to_string()))?;
 
@@ -166,7 +167,7 @@ mod inner {
 
         pub(super) fn close(&mut self) -> Result<(), Error> {
             if let Some(origin_stdin_flags) = &self.orig_flags {
-                termios::tcsetattr(STDIN_FILENO, termios::SetArg::TCSAFLUSH, origin_stdin_flags)
+                termios::tcsetattr(unsafe { &BorrowedFd::borrow_raw(STDIN_FILENO) }, termios::SetArg::TCSAFLUSH, origin_stdin_flags)
                     .map_err(|e| Error::unknown("failed to call tcsetattr", e.to_string()))?;
             }