diff --git a/flake.nix b/flake.nix
index 50c90b5..a918126 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,8 +20,8 @@
             flang-source = nixpkgs.legacyPackages.${system}.fetchgit {
               url = "https://github.com/r-wasm/llvm-project";
               # This is the tip of the wasm branch.
-              rev = "622b6f4cb1fb10ca262d287245d7e6b39c503c8f";
-              hash = "sha256-AH9bauC9uYj1+PMgVH+qEEoWaGtzWRr5zSsCfP0iZZ4=";
+              rev = "dd6047a18c5fc1c84978d141c5d820cf28e3c952";
+              hash = "sha256-iQ7GIFkzATKmTOzJB72ydQQZGcQnp2g29qR5tG7pLqw=";
             };
           });