diff --git a/library/std/src/sys/unix/fs.rs b/library/std/src/sys/unix/fs.rs
index 92e49f1744c80..4dea9b168eef8 100644
--- a/library/std/src/sys/unix/fs.rs
+++ b/library/std/src/sys/unix/fs.rs
@@ -1699,11 +1699,11 @@ mod remove_dir_impl {
     use crate::sys::{cvt, cvt_r};
 
     #[cfg(not(any(
-        target_os = "linux",
+        all(target_os = "linux", target_env = "gnu"),
         all(target_os = "macos", not(target_arch = "aarch64"))
     )))]
     use libc::{fdopendir, openat, unlinkat};
-    #[cfg(target_os = "linux")]
+    #[cfg(all(target_os = "linux", target_env = "gnu"))]
     use libc::{fdopendir, openat64 as openat, unlinkat};
     #[cfg(all(target_os = "macos", not(target_arch = "aarch64")))]
     use macos_weak::{fdopendir, openat, unlinkat};
diff --git a/library/std/src/sys/unix/kernel_copy.rs b/library/std/src/sys/unix/kernel_copy.rs
index 2eca34ffbc044..3c9f8267a333b 100644
--- a/library/std/src/sys/unix/kernel_copy.rs
+++ b/library/std/src/sys/unix/kernel_copy.rs
@@ -61,9 +61,9 @@ use crate::ptr;
 use crate::sync::atomic::{AtomicBool, AtomicU8, Ordering};
 use crate::sys::cvt;
 use crate::sys::weak::syscall;
-#[cfg(not(target_os = "linux"))]
+#[cfg(not(all(target_os = "linux", target_env = "gnu")))]
 use libc::sendfile as sendfile64;
-#[cfg(target_os = "linux")]
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
 use libc::sendfile64;
 use libc::{EBADF, EINVAL, ENOSYS, EOPNOTSUPP, EOVERFLOW, EPERM, EXDEV};
 
diff --git a/library/std/src/sys/unix/mod.rs b/library/std/src/sys/unix/mod.rs
index 23d9cf4ac0a9a..05262e04eea2c 100644
--- a/library/std/src/sys/unix/mod.rs
+++ b/library/std/src/sys/unix/mod.rs
@@ -95,9 +95,9 @@ pub unsafe fn init(argc: isize, argv: *const *const u8, sigpipe: u8) {
         )))]
         'poll: {
             use crate::sys::os::errno;
-            #[cfg(not(target_os = "linux"))]
+            #[cfg(not(all(target_os = "linux", target_env = "gnu")))]
             use libc::open as open64;
-            #[cfg(target_os = "linux")]
+            #[cfg(all(target_os = "linux", target_env = "gnu"))]
             use libc::open64;
             let pfds: &mut [_] = &mut [
                 libc::pollfd { fd: 0, events: 0, revents: 0 },
@@ -143,9 +143,9 @@ pub unsafe fn init(argc: isize, argv: *const *const u8, sigpipe: u8) {
         )))]
         {
             use crate::sys::os::errno;
-            #[cfg(not(target_os = "linux"))]
+            #[cfg(not(all(target_os = "linux", target_env = "gnu")))]
             use libc::open as open64;
-            #[cfg(target_os = "linux")]
+            #[cfg(all(target_os = "linux", target_env = "gnu"))]
             use libc::open64;
             for fd in 0..3 {
                 if libc::fcntl(fd, libc::F_GETFD) == -1 && errno() == libc::EBADF {
diff --git a/library/std/src/sys/unix/stack_overflow.rs b/library/std/src/sys/unix/stack_overflow.rs
index 957e086798fd3..b59d4ba26afb9 100644
--- a/library/std/src/sys/unix/stack_overflow.rs
+++ b/library/std/src/sys/unix/stack_overflow.rs
@@ -45,9 +45,9 @@ mod imp {
     use crate::thread;
 
     use libc::MAP_FAILED;
-    #[cfg(not(target_os = "linux"))]
+    #[cfg(not(all(target_os = "linux", target_env = "gnu")))]
     use libc::{mmap as mmap64, munmap};
-    #[cfg(target_os = "linux")]
+    #[cfg(all(target_os = "linux", target_env = "gnu"))]
     use libc::{mmap64, munmap};
     use libc::{sigaction, sighandler_t, SA_ONSTACK, SA_SIGINFO, SIGBUS, SIG_DFL};
     use libc::{sigaltstack, SIGSTKSZ, SS_DISABLE};
diff --git a/library/std/src/sys/unix/thread.rs b/library/std/src/sys/unix/thread.rs
index 6fe257eeafbd0..93a8c48d017df 100644
--- a/library/std/src/sys/unix/thread.rs
+++ b/library/std/src/sys/unix/thread.rs
@@ -655,9 +655,9 @@ pub mod guard {
 ))]
 #[cfg_attr(test, allow(dead_code))]
 pub mod guard {
-    #[cfg(not(target_os = "linux"))]
+    #[cfg(not(all(target_os = "linux", target_env = "gnu")))]
     use libc::{mmap as mmap64, mprotect};
-    #[cfg(target_os = "linux")]
+    #[cfg(all(target_os = "linux", target_env = "gnu"))]
     use libc::{mmap64, mprotect};
     use libc::{MAP_ANON, MAP_FAILED, MAP_FIXED, MAP_PRIVATE, PROT_NONE, PROT_READ, PROT_WRITE};