duckdb: work around the excessive logging

https://hydra.nixos.org/build/337747651#tabs-buildsteps

pkgs/by-name/du/duckdb/package.nix

@@ -152,11 +152,13 @@ stdenv.mkDerivation (finalAttrs: {
       );
       LD_LIBRARY_PATH = lib.optionalString stdenv.hostPlatform.isDarwin "DY" + "LD_LIBRARY_PATH";
     in
+    # FIXME: do something about the excessive logging on x86_64-linux (> 250 MiB).
     ''
       runHook preInstallCheck
       (($(ulimit -n) < 1024)) && ulimit -n 1024
 
-      HOME="$(mktemp -d)" ${LD_LIBRARY_PATH}="$lib/lib" ./test/unittest ${toString excludes}
+      HOME="$(mktemp -d)" ${LD_LIBRARY_PATH}="$lib/lib" ./test/unittest ${toString excludes}${
+        lib.optionalString stdenv.hostPlatform.isx86_64 " >/dev/null" }
 
       runHook postInstallCheck
     '';