diff --git a/cmake/ConfigureChecks.cmake b/cmake/ConfigureChecks.cmake
index 0686d4ef0..58021ac0f 100644
--- a/cmake/ConfigureChecks.cmake
+++ b/cmake/ConfigureChecks.cmake
@@ -44,15 +44,6 @@ include(CheckCXXSymbolExists)
 include(CheckCXXSourceCompiles)
 include(CheckTypeSize)
 
-# workaround for lousy mtime precision on a Linux kernel
-if (CMAKE_SYSTEM_NAME MATCHES "Linux|Android")
-    check_cxx_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME)
-    check_cxx_symbol_exists(futimens sys/stat.h HAVE_FUTIMENS)
-    if ((HAVE_CLOCK_GETTIME) AND (HAVE_FUTIMENS))
-        set(UVAR_FILE_SET_MTIME_HACK 1)
-    endif()
-endif()
-
 check_cxx_symbol_exists(gettext libintl.h HAVE_GETTEXT)
 
 check_type_size("wchar_t[8]" WCHAR_T_BITS LANGUAGE CXX)
diff --git a/config_cmake.h.in b/config_cmake.h.in
index b212e5735..81887c52f 100644
--- a/config_cmake.h.in
+++ b/config_cmake.h.in
@@ -7,9 +7,6 @@
 /* Define to 1 if the _nl_msg_cat_cntr symbol is exported. */
 #cmakedefine HAVE__NL_MSG_CAT_CNTR 1
 
-/* Define to use clock_gettime and futimens to hack around Linux mtime issue */
-#cmakedefine UVAR_FILE_SET_MTIME_HACK 1
-
 /* Define to the address where bug reports for this package should be sent. */
 #define PACKAGE_BUGREPORT "https://github.com/fish-shell/fish-shell/issues"
 
diff --git a/src/env_universal_common.rs b/src/env_universal_common.rs
index 1867395dd..efad49460 100644
--- a/src/env_universal_common.rs
+++ b/src/env_universal_common.rs
@@ -9,7 +9,6 @@ use crate::fallback::fish_mkstemp_cloexec;
 use crate::fds::AutoCloseFd;
 use crate::fds::{open_cloexec, wopen_cloexec};
 use crate::flog::{FLOG, FLOGF};
-use crate::libc::UVAR_FILE_SET_MTIME_HACK;
 use crate::path::path_get_config;
 use crate::path::{path_get_config_remoteness, DirRemoteness};
 use crate::wchar::prelude::*;
@@ -20,9 +19,7 @@ use crate::wutil::{
     wunlink, FileId, INVALID_FILE_ID,
 };
 use errno::{errno, Errno};
-use libc::{
-    CLOCK_REALTIME, EINTR, ENOTSUP, EOPNOTSUPP, LOCK_EX, O_CREAT, O_RDONLY, O_RDWR, UTIME_OMIT,
-};
+use libc::{EINTR, ENOTSUP, EOPNOTSUPP, LOCK_EX, O_CREAT, O_RDONLY, O_RDWR};
 use std::collections::hash_map::Entry;
 use std::collections::HashSet;
 use std::ffi::CString;
@@ -800,10 +797,11 @@ impl EnvUniversal {
             //
             // It's probably worth finding a simpler solution to this. The tests ran into this, but it's
             // unlikely to affect users.
-            if unsafe { UVAR_FILE_SET_MTIME_HACK() } {
+            #[cfg(any(target_os = "linux", target_os = "android"))]
+            {
                 let mut times: [libc::timespec; 2] = unsafe { std::mem::zeroed() };
-                times[0].tv_nsec = UTIME_OMIT; // don't change ctime
-                if unsafe { libc::clock_gettime(CLOCK_REALTIME, &mut times[1]) } != 0 {
+                times[0].tv_nsec = libc::UTIME_OMIT; // don't change ctime
+                if unsafe { libc::clock_gettime(libc::CLOCK_REALTIME, &mut times[1]) } != 0 {
                     unsafe {
                         libc::futimens(private_fd.fd(), &times[0]);
                     }
diff --git a/src/libc.c b/src/libc.c
index c1f1ddc35..6440878ac 100644
--- a/src/libc.c
+++ b/src/libc.c
@@ -64,15 +64,6 @@ int C_PC_CASE_SENSITIVE() {
 
 FILE* stdout_stream() { return stdout; }
 
-static const bool uvar_file_set_mtime_hack =
-#ifdef UVAR_FILE_SET_MTIME_HACK
-    true;
-#else
-    false;
-#endif
-#undef UVAR_FILE_SET_MTIME_HACK
-bool UVAR_FILE_SET_MTIME_HACK() { return uvar_file_set_mtime_hack; }
-
 int C_RLIMIT_CORE() { return RLIMIT_CORE; }
 int C_RLIMIT_DATA() { return RLIMIT_DATA; }
 int C_RLIMIT_FSIZE() { return RLIMIT_FSIZE; }
diff --git a/src/libc.rs b/src/libc.rs
index 5b26f56b0..8e3af35e5 100644
--- a/src/libc.rs
+++ b/src/libc.rs
@@ -48,7 +48,6 @@ extern "C" {
         len: libc::size_t,
     ) -> libc::size_t;
     pub fn stdout_stream() -> *mut libc::FILE;
-    pub fn UVAR_FILE_SET_MTIME_HACK() -> bool;
     pub fn setlinebuf(stream: *mut libc::FILE);
 }