diff --git a/pkgs/development/libraries/openmpi/default.nix b/pkgs/development/libraries/openmpi/default.nix
index 13f633ac0df..61e3165dd3f 100644
--- a/pkgs/development/libraries/openmpi/default.nix
+++ b/pkgs/development/libraries/openmpi/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, fetchpatch, gfortran, perl, libnl
 , rdma-core, zlib, numactl, libevent, hwloc, targetPackages, symlinkJoin
-, libpsm2, libfabric, pmix
+, libpsm2, libfabric, pmix, ucx
 
 # Enable CUDA support
 , cudaSupport ? false, cudatoolkit ? null
@@ -46,7 +46,7 @@ in stdenv.mkDerivation rec {
   '';
 
   buildInputs = with stdenv; [ gfortran zlib ]
-    ++ lib.optionals isLinux [ libnl numactl pmix ]
+    ++ lib.optionals isLinux [ libnl numactl pmix ucx ]
     ++ lib.optionals cudaSupport [ cudatoolkit ]
     ++ [ libevent hwloc ]
     ++ lib.optional (isLinux || isFreeBSD) rdma-core
diff --git a/pkgs/development/libraries/ucx/default.nix b/pkgs/development/libraries/ucx/default.nix
index 9ec8ca660cf..1961e8aef68 100644
--- a/pkgs/development/libraries/ucx/default.nix
+++ b/pkgs/development/libraries/ucx/default.nix
@@ -3,7 +3,7 @@
 }:
 
 let
-  version = "1.7.0";
+  version = "1.8.1";
 
 in stdenv.mkDerivation {
   name = "ucx-${version}";
@@ -12,7 +12,7 @@ in stdenv.mkDerivation {
     owner = "openucx";
     repo = "ucx";
     rev = "v${version}";
-    sha256 = "149p8s7jrg7pbbq0hw0qm8va119bsl19q4scgk94vjqliyc1s33h";
+    sha256 = "0yfnx4shgydkp447kipavjzgl6z58jan6l7znhdi8ry4zbgk568a";
   };
 
   nativeBuildInputs = [ autoreconfHook doxygen ];