diff --git a/pkgs/by-name/ma/matrix-authentication-service/package.nix b/pkgs/by-name/ma/matrix-authentication-service/package.nix
index 8b2dacbb6fbc..5e4ebdcdee74 100644
--- a/pkgs/by-name/ma/matrix-authentication-service/package.nix
+++ b/pkgs/by-name/ma/matrix-authentication-service/package.nix
@@ -98,5 +98,8 @@ rustPlatform.buildRustPackage rec {
     license = lib.licenses.agpl3Only;
     maintainers = with lib.maintainers; [ teutat3s ];
     mainProgram = "mas-cli";
+    # Note: broken on x86_64-darwin because of aligned_alloc, can be revisited after
+    # https://github.com/NixOS/nixpkgs/pull/346043 is merged
+    badPlatforms = [ "x86_64-darwin" ];
   };
 }