diff --git a/pkgs/development/libraries/smesh/default.nix b/pkgs/development/libraries/smesh/default.nix
index 529f910c35a..9a52c42c939 100644
--- a/pkgs/development/libraries/smesh/default.nix
+++ b/pkgs/development/libraries/smesh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, ninja, opencascade }:
+{ stdenv, fetchFromGitHub, fetchpatch, cmake, ninja, opencascade }:
 
 stdenv.mkDerivation rec {
   pname = "smesh";
@@ -11,6 +11,14 @@ stdenv.mkDerivation rec {
     sha256 = "1b07j3bw3lnxk8dk3x1kkl2mbsmfwi98si84054038lflaaijzi0";
   };
 
+  patches = [
+    (fetchpatch {
+      name = "fix-build-with-clang.patch";
+      url = "https://github.com/tpaviot/smesh/commit/e32c430f526f1637ec5973c9723acbc5be571ae3.patch";
+      sha256 = "0s4j5rb70g3jvvkgfbrxv7q52wk6yjyjiaya61gy2j64khplcjlb";
+    })
+  ];
+
   nativeBuildInputs = [ cmake ninja ];
   buildInputs = [ opencascade ];