1 files changed, 11 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/llvm/13/openmp/default.nix b/nixpkgs/pkgs/development/compilers/llvm/13/openmp/default.nix
index 8eca980d601c..7b461df438f9 100644
--- a/nixpkgs/pkgs/development/compilers/llvm/13/openmp/default.nix
+++ b/nixpkgs/pkgs/development/compilers/llvm/13/openmp/default.nix
@@ -2,6 +2,7 @@
 , stdenv
 , llvm_meta
 , src
+, fetchpatch
 , cmake
 , llvm
 , targetLlvm
@@ -16,6 +17,16 @@ stdenv.mkDerivation rec {
   inherit src;
   sourceRoot = "${src.name}/${pname}";
 
+  patches = [
+    # Fix cross.
+    (fetchpatch {
+      url = "https://github.com/llvm/llvm-project/commit/5e2358c781b85a18d1463fd924d2741d4ae5e42e.patch";
+      hash = "sha256-UxIlAifXnexF/MaraPW0Ut6q+sf3e7y1fMdEv1q103A=";
+    })
+  ];
+
+  patchFlags = [ "-p2" ];
+
   nativeBuildInputs = [ cmake perl ];
   buildInputs = [
     (if stdenv.buildPlatform == stdenv.hostPlatform then llvm else targetLlvm)