diff --git a/pkgs/development/compilers/llvm/18/default.nix b/pkgs/development/compilers/llvm/18/default.nix
index f50af308cc4d..5b2b09bbb6ec 100644
--- a/pkgs/development/compilers/llvm/18/default.nix
+++ b/pkgs/development/compilers/llvm/18/default.nix
@@ -1,6 +1,6 @@
 { lowPrio, newScope, pkgs, lib, stdenv, cmake, ninja
 , preLibcCrossHeaders
-, libxml2, python3, fetchFromGitHub, fetchpatch, substituteAll, overrideCC, wrapCCWith, wrapBintoolsWith
+, libxml2, python3, fetchFromGitHub, substituteAll, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 , targetLlvm
@@ -146,11 +146,6 @@ in let
         # https://reviews.llvm.org/D51899
         ./clang/gnu-install-dirs.patch
         ../common/clang/add-nostdlibinc-flag.patch
-        (fetchpatch {
-          url = "https://github.com/llvm/llvm-project/commit/48c1364200b5649dda2f9ccbe382b0bd908b99de.patch";
-          sha256 = "sha256-beSydky0P/06YDLk0GJDtcREpMcU2FspxuYU6EnQGfA=";
-          stripLen = 1;
-        })
         (substituteAll {
           src = ../common/clang/clang-at-least-16-LLVMgold-path.patch;
           libllvmLibdir = "${tools.libllvm.lib}/lib";
@@ -396,12 +391,7 @@ in let
     # so: we use the clang from this LLVM package set instead of the regular
     # stdenv's compiler.
     libcxx = callPackage ../common/libcxx {
-      patches = [
-        (fetchpatch {
-          url = "https://github.com/llvm/llvm-project/commit/1118c2e05e67a36ed8ca250524525cdb66a55256.patch";
-          sha256 = "sha256-2lDO9UsglvYAxDG3/iTXqGVHn1Hq3O7wtkCUb9I/Buc=";
-        })
-      ] ++ lib.optionals (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
+      patches = lib.optionals (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
         # https://github.com/llvm/llvm-project/issues/64226
         ./libcxx/0001-darwin-10.12-mbstate_t-fix.patch
       ];