diff --git a/hack/ci-coverage.sh b/hack/ci-coverage.sh
index 09ba3f981..800b9c9a6 100755
--- a/hack/ci-coverage.sh
+++ b/hack/ci-coverage.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Run coverage tests
-./bazel.sh --bazelrc=.buildkite-bazelrc coverage --config=remote-cache --features=norace --test_tag_filters="-race_on" --nocache_test_results -k  //...
+./bazel.sh --bazelrc=.buildkite-bazelrc coverage --config=remote-cache --config=nostamp --features=norace --test_tag_filters="-race_on" --nocache_test_results -k  //...
 
 # Collect all coverage results into a single file (for deepsource).
 find "$(./bazel.sh --bazelrc=.buildkite-bazelrc info bazel-testlogs)" -iname coverage.dat -print0 | xargs -t -rd '\n' -0 ./bazel.sh --bazelrc=.buildkite-bazelrc run //tools/gocovmerge:gocovmerge -- > /tmp/cover.out
diff --git a/hack/upload_fuzzers.sh b/hack/upload_fuzzers.sh
index 97306bde1..46d555c13 100755
--- a/hack/upload_fuzzers.sh
+++ b/hack/upload_fuzzers.sh
@@ -4,7 +4,7 @@
 # Clusterfuzz will pick up the new fuzz bundles as fuzzing jobs are run.
 
 # Build targets.
-bazel build --config=fuzz \
+bazel build --config=fuzz --config=nostamp \
   //testing/fuzz:block_fuzz_test_libfuzzer_bundle \
   //testing/fuzz:state_fuzz_test_libfuzzer_bundle \
   //testing/fuzz:ssz_encoder_attestations_test_libfuzzer_bundle