mongos (at least as compiled by gcc) requires transaction_participant_resource_yielder.cpp which is defined by mongo_cc_library(name = "transaction" ...) in src/mongo/db/transaction/BUILD.bazel diff '--color=auto' -ur a/src/mongo/s/BUILD.bazel b/src/mongo/s/BUILD.bazel --- a/src/mongo/s/BUILD.bazel 2026-08-11 16:50:47.000000000 -0400 +++ b/src/mongo/s/BUILD.bazel 2026-08-27 14:32:05.648190479 -0400 @@ -605,6 +605,7 @@ "//src/mongo/db/session:session_catalog", "//src/mongo/db:startup_warnings_common", "//src/mongo/db/stats:system_buckets_metrics", + "//src/mongo/db/transaction", "//src/mongo/db/topology/cluster_parameters:cluster_server_parameter_refresher", "//src/mongo/db:change_streams_cluster_parameter", "//src/mongo/otel/traces:tracing_initialization",