diff --git a/pkgs/development/tools/misc/autoconf/2.71-fix-race.patch b/pkgs/development/tools/misc/autoconf/2.71-fix-race.patch
deleted file mode 100644
index e3b28554352b..000000000000
--- a/pkgs/development/tools/misc/autoconf/2.71-fix-race.patch
+++ /dev/null
@@ -1,36 +0,0 @@
-https://savannah.gnu.org/support/index.php?110521
-https://git.savannah.gnu.org/cgit/autoconf.git/patch/?id=3a9802d60156809c139e9b4620bf04917e143ee2
---- a/lib/Autom4te/FileUtils.pm
-+++ b/lib/Autom4te/FileUtils.pm
-@@ -34,12 +34,12 @@ This perl module provides various general purpose file handling functions.
- 
- =cut
- 
--use 5.006;
-+use 5.008;
- use strict;
- use warnings FATAL => 'all';
- 
- use Exporter;
--use File::stat;
-+use Time::HiRes qw(stat);
- use IO::File;
- 
- use Autom4te::Channels;
-@@ -115,10 +115,11 @@ sub mtime ($)
-   return 0
-     if $file eq '-' || ! -f $file;
- 
--  my $stat = stat ($file)
-+  my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
-+    $atime,$mtime,$ctime,$blksize,$blocks) = stat ($file)
-     or fatal "cannot stat $file: $!";
- 
--  return $stat->mtime;
-+  return $mtime;
- }
- 
- 
--- 
-cgit v1.2.1
-
diff --git a/pkgs/development/tools/misc/autoconf/2.71.nix b/pkgs/development/tools/misc/autoconf/2.71.nix
deleted file mode 100644
index 96b369d68e7f..000000000000
--- a/pkgs/development/tools/misc/autoconf/2.71.nix
+++ /dev/null
@@ -1,83 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  m4,
-  perl,
-  texinfo,
-}:
-
-# Note: this package is used for bootstrapping fetchurl, and thus
-# cannot use fetchpatch! All mutable patches (generated by GitHub or
-# cgit) that are needed here should be included directly in Nixpkgs as
-# files.
-
-stdenv.mkDerivation rec {
-  pname = "autoconf";
-  version = "2.71";
-  outputs = [
-    "out"
-    "doc"
-  ];
-
-  src = fetchurl {
-    url = "mirror://gnu/autoconf/autoconf-${version}.tar.xz";
-    sha256 = "197sl23irn6s9pd54rxj5vcp5y8dv65jb9yfqgr2g56cxg7q6k7i";
-  };
-  patches = [
-    # fix stale autom4te cache race condition:
-    #  https://savannah.gnu.org/support/index.php?110521
-    ./2.71-fix-race.patch
-  ];
-
-  strictDeps = true;
-  nativeBuildInputs = [
-    m4
-    perl
-    texinfo
-  ];
-  buildInputs = [ m4 ];
-  postBuild = "
-    make html
-  ";
-
-  postInstall = "
-    make install-html
-  ";
-
-  # Work around a known issue in Cygwin.  See
-  # http://thread.gmane.org/gmane.comp.sysutils.autoconf.bugs/6822 for
-  # details.
-  # There are many test failures on `i386-pc-solaris2.11'.
-  doCheck = ((!stdenv.hostPlatform.isCygwin) && (!stdenv.hostPlatform.isSunOS));
-
-  # Don't fixup "#! /bin/sh" in Autoconf, otherwise it will use the
-  # "fixed" path in generated files!
-  dontPatchShebangs = true;
-
-  enableParallelBuilding = true;
-
-  # Make the Autotest test suite run in parallel.
-  preCheck = ''
-    export TESTSUITEFLAGS="-j$NIX_BUILD_CORES"
-  '';
-
-  meta = {
-    homepage = "https://www.gnu.org/software/autoconf/";
-    description = "Part of the GNU Build System";
-
-    longDescription = ''
-      GNU Autoconf is an extensible package of M4 macros that produce
-      shell scripts to automatically configure software source code
-      packages.  These scripts can adapt the packages to many kinds of
-      UNIX-like systems without manual user intervention.  Autoconf
-      creates a configuration script for a package from a template
-      file that lists the operating system features that the package
-      can use, in the form of M4 macro calls.
-    '';
-
-    license = lib.licenses.gpl3Plus;
-
-    platforms = lib.platforms.all;
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 4f79b0f6e4ff..62610a9fd684 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -338,9 +338,11 @@ mapAliases {
   autobase = throw "'autobase' is a Node library, use buildNpmPackage for that"; # Added 2025-09-26
   autoconf213 = throw "'autoconf213' has been removed in favor of 'autoconf'"; # Added 2025-07-21
   autoconf264 = throw "'autoconf264' has been removed in favor of 'autoconf'"; # Added 2025-07-21
+  autoconf271 = throw "'autoconf271' has been removed in favor of 'autoconf'"; # Added 2026-03-29
   automake111x = throw "'automake111x' has been removed in favor of 'automake'"; # Added 2025-07-21
   autopanosiftc = throw "'autopanosiftc' has been removed, as it is unmaintained upstream"; # Added 2025-10-07
   autoreconfHook264 = throw "'autoreconfHook264' has been removed in favor of 'autoreconfHook'"; # Added 2025-07-21
+  autoreconfHook271 = throw "'autoreconfHook271' has been removed in favor of 'autoreconfHook'"; # Added 2026-03-29
   av-98 = throw "'av-98' has been removed because it has been broken since at least November 2024."; # Added 2025-10-03
   avr-sim = throw "'avr-sim' has been removed as it was broken and unmaintained. Possible alternatives are 'simavr', SimulAVR and AVRStudio."; # Added 2025-05-31
   awesome-4-0 = throw "'awesome-4-0' has been renamed to/replaced by 'awesome'"; # Converted to throw 2025-10-27
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cec6f9074e6e..7e12b39cbcd6 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -233,9 +233,6 @@ with pkgs;
   autoreconfHook269 = autoreconfHook.override {
     autoconf = autoconf269;
   };
-  autoreconfHook271 = autoreconfHook.override {
-    autoconf = autoconf271;
-  };
 
   autoPatchelfHook = makeSetupHook {
     name = "auto-patchelf-hook";
@@ -5479,7 +5476,6 @@ with pkgs;
 
   autoconf = callPackage ../development/tools/misc/autoconf { };
   autoconf269 = callPackage ../development/tools/misc/autoconf/2.69.nix { };
-  autoconf271 = callPackage ../development/tools/misc/autoconf/2.71.nix { };
 
   automake = automake118x;