diff --git a/utils/build.config b/utils/build.config
index 174df687036..c38d49a267a 100644
--- a/utils/build.config
+++ b/utils/build.config
@@ -29,3 +29,4 @@ ucx=https://github.com/openucx/ucx.git
 spdk=https://github.com/spdk/spdk/commit/b0aba3fcd5aceceea530a702922153bc75664978.diff,https://github.com/spdk/spdk/commit/445a4c808badbad3942696ecf16fa60e8129a747.diff
 ofi=https://github.com/ofiwg/libfabric/commit/d827c6484cc5bf67dfbe395890e258860c3f0979.diff
 fuse=https://github.com/libfuse/libfuse/commit/c9905341ea34ff9acbc11b3c53ba8bcea35eeed8.diff
+mercury=https://raw.githubusercontent.com/daos-stack/mercury/481297621bafbbcac4cc6f8feab3f1b6f8b14b59/na_ucx_keyres_epchk.patch