diff --git a/.scripts/build_steps.sh b/.scripts/build_steps.sh
index 7fbce051..99baf86d 100755
--- a/.scripts/build_steps.sh
+++ b/.scripts/build_steps.sh
@@ -10,9 +10,10 @@ export FEEDSTOCK_ROOT="${FEEDSTOCK_ROOT:-/home/conda/feedstock_root}"
 source ${FEEDSTOCK_ROOT}/.scripts/logging_utils.sh
 
 
-endgroup "Start Docker"
+( endgroup "Start Docker" ) 2> /dev/null
+
+( startgroup "Configuring conda" ) 2> /dev/null
 
-startgroup "Configuring conda"
 export PYTHONUNBUFFERED=1
 export RECIPE_ROOT="${RECIPE_ROOT:-/home/conda/recipe_root}"
 export CI_SUPPORT="${FEEDSTOCK_ROOT}/.ci_support"
@@ -40,34 +41,38 @@ if [[ "${HOST_PLATFORM}" != "${BUILD_PLATFORM}" ]] && [[ "${BUILD_WITH_CONDA_DEB
      EXTRA_CB_OPTIONS="${EXTRA_CB_OPTIONS:-} --no-test"
 fi
 
-endgroup "Configuring conda"
+
+( endgroup "Configuring conda" ) 2> /dev/null
 
 if [[ "${BUILD_WITH_CONDA_DEBUG:-0}" == 1 ]]; then
-    startgroup "Running conda debug"
     if [[ "x${BUILD_OUTPUT_ID:-}" != "x" ]]; then
         EXTRA_CB_OPTIONS="${EXTRA_CB_OPTIONS:-} --output-id ${BUILD_OUTPUT_ID}"
     fi
     conda debug "${RECIPE_ROOT}" -m "${CI_SUPPORT}/${CONFIG}.yaml" \
         ${EXTRA_CB_OPTIONS:-} \
         --clobber-file "${CI_SUPPORT}/clobber_${CONFIG}.yaml"
-    endgroup "Running conda debug"
+
     # Drop into an interactive shell
     /bin/bash
 else
-    startgroup "Running conda $BUILD_CMD"
     conda $BUILD_CMD "${RECIPE_ROOT}" -m "${CI_SUPPORT}/${CONFIG}.yaml" \
         --suppress-variables ${EXTRA_CB_OPTIONS:-} \
         --clobber-file "${CI_SUPPORT}/clobber_${CONFIG}.yaml"
-    endgroup "Running conda build"
-    startgroup "Validating outputs"
+    ( startgroup "Validating outputs" ) 2> /dev/null
+
     validate_recipe_outputs "${FEEDSTOCK_NAME}"
-    endgroup "Validating outputs"
+
+    ( endgroup "Validating outputs" ) 2> /dev/null
+
+    ( startgroup "Uploading packages" ) 2> /dev/null
 
     if [[ "${UPLOAD_PACKAGES}" != "False" ]]; then
-        startgroup "Uploading packages"
         upload_package --validate --feedstock-name="${FEEDSTOCK_NAME}"  "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
-        endgroup "Uploading packages"
     fi
+
+    ( endgroup "Uploading packages" ) 2> /dev/null
 fi
 
+( startgroup "Final checks" ) 2> /dev/null
+
 touch "${FEEDSTOCK_ROOT}/build_artifacts/conda-forge-build-done-${CONFIG}"
\ No newline at end of file
diff --git a/.scripts/logging_utils.sh b/.scripts/logging_utils.sh
index a53ef3f2..57bc95c2 100644
--- a/.scripts/logging_utils.sh
+++ b/.scripts/logging_utils.sh
@@ -13,18 +13,23 @@ function startgroup {
         travis )
             echo "$1"
             echo -en 'travis_fold:start:'"${1// /}"'\\r';;
+        github_actions )
+            echo "::group::$1";;
         * )
             echo "$1";;
     esac
-}
+} 2> /dev/null
 
 function endgroup {
     # End a foldable group of log lines
     # Pass a single argument, quoted
+
     case ${CI:-} in
         azure )
             echo "##[endgroup]";;
         travis )
             echo -en 'travis_fold:end:'"${1// /}"'\\r';;
+        github_actions )
+            echo "::endgroup::";;
     esac
-}
+} 2> /dev/null
diff --git a/.scripts/run_docker_build.sh b/.scripts/run_docker_build.sh
index 16d6c15a..44ad3ce0 100755
--- a/.scripts/run_docker_build.sh
+++ b/.scripts/run_docker_build.sh
@@ -7,7 +7,7 @@
 
 source .scripts/logging_utils.sh
 
-startgroup "Configure Docker"
+( startgroup "Configure Docker" ) 2> /dev/null
 
 set -xeo pipefail
 
@@ -69,9 +69,11 @@ DOCKER_RUN_ARGS="${CONDA_FORGE_DOCKER_RUN_ARGS}"
 if [ -z "${CI}" ]; then
     DOCKER_RUN_ARGS="-it ${DOCKER_RUN_ARGS}"
 fi
-endgroup "Configure Docker"
 
-startgroup "Start Docker"
+( endgroup "Configure Docker" ) 2> /dev/null
+
+( startgroup "Start Docker" ) 2> /dev/null
+
 export UPLOAD_PACKAGES="${UPLOAD_PACKAGES:-True}"
 docker run ${DOCKER_RUN_ARGS} \
            -v "${RECIPE_ROOT}":/home/conda/recipe_root:rw,z,delegated \
@@ -94,4 +96,7 @@ docker run ${DOCKER_RUN_ARGS} \
            /home/conda/feedstock_root/${PROVIDER_DIR}/build_steps.sh
 
 # verify that the end of the script was reached
-test -f "$DONE_CANARY"
\ No newline at end of file
+test -f "$DONE_CANARY"
+
+# This closes the last group opened in `build_steps.sh`
+( endgroup "Final checks" ) 2> /dev/null
\ No newline at end of file
diff --git a/.scripts/run_osx_build.sh b/.scripts/run_osx_build.sh
index 7688497f..cbcce724 100755
--- a/.scripts/run_osx_build.sh
+++ b/.scripts/run_osx_build.sh
@@ -2,16 +2,19 @@
 
 source .scripts/logging_utils.sh
 
-set -x
+set -xe
+
+( startgroup "Installing a fresh version of Miniforge" ) 2> /dev/null
 
-startgroup "Installing a fresh version of Miniforge"
 MINIFORGE_URL="https://github.com/conda-forge/miniforge/releases/latest/download"
 MINIFORGE_FILE="Miniforge3-MacOSX-x86_64.sh"
 curl -L -O "${MINIFORGE_URL}/${MINIFORGE_FILE}"
 bash $MINIFORGE_FILE -b
-endgroup "Installing a fresh version of Miniforge"
 
-startgroup "Configuring conda"
+( endgroup "Installing a fresh version of Miniforge" ) 2> /dev/null
+
+( startgroup "Configuring conda" ) 2> /dev/null
+
 BUILD_CMD=build
 
 source ${HOME}/miniforge3/etc/profile.d/conda.sh
@@ -34,11 +37,10 @@ echo -e "\n\nRunning the build setup script."
 source run_conda_forge_build_setup
 
 
-endgroup "Configuring conda"
 
-set -e
+( endgroup "Configuring conda" ) 2> /dev/null
+
 
-startgroup "Running conda $BUILD_CMD"
 echo -e "\n\nMaking the build clobber file"
 make_build_number ./ ./recipe ./.ci_support/${CONFIG}.yaml
 
@@ -47,13 +49,16 @@ if [[ "${HOST_PLATFORM}" != "${BUILD_PLATFORM}" ]]; then
 fi
 
 conda $BUILD_CMD ./recipe -m ./.ci_support/${CONFIG}.yaml --suppress-variables --clobber-file ./.ci_support/clobber_${CONFIG}.yaml ${EXTRA_CB_OPTIONS:-}
-endgroup "Running conda build"
-startgroup "Validating outputs"
+( startgroup "Validating outputs" ) 2> /dev/null
+
 validate_recipe_outputs "${FEEDSTOCK_NAME}"
-endgroup "Validating outputs"
+
+( endgroup "Validating outputs" ) 2> /dev/null
+
+( startgroup "Uploading packages" ) 2> /dev/null
 
 if [[ "${UPLOAD_PACKAGES}" != "False" ]]; then
-  startgroup "Uploading packages"
   upload_package --validate --feedstock-name="${FEEDSTOCK_NAME}" ./ ./recipe ./.ci_support/${CONFIG}.yaml
-  endgroup "Uploading packages"
-fi
\ No newline at end of file
+fi
+
+( endgroup "Uploading packages" ) 2> /dev/null
\ No newline at end of file
diff --git a/README.md b/README.md
index 132a5fba..636a4e44 100644
--- a/README.md
+++ b/README.md
@@ -109,6 +109,7 @@ Installing `openmpi-mpi` from the `conda-forge` channel can be achieved by addin
 
 ```
 conda config --add channels conda-forge
+conda config --set channel_priority strict
 ```
 
 Once the `conda-forge` channel has been enabled, `openmpi, openmpi-mpicc, openmpi-mpicxx, openmpi-mpifort` can be installed with:
diff --git a/recipe/build-mpi.sh b/recipe/build-mpi.sh
index ed3472bf..11395a64 100755
--- a/recipe/build-mpi.sh
+++ b/recipe/build-mpi.sh
@@ -21,8 +21,8 @@ if [[ "$target_platform" == osx-* ]]; then
     fi
 fi
 
-if [ $cuda_compiler_version == '10.2' ]; then
-    build_with_cuda="--with-cuda"
+if [[ $cuda_compiler_version == 10.2 ]]; then
+    build_with_cuda="--with-cuda --with-ucx=$PREFIX"
 else
     build_with_cuda=""
 fi
@@ -159,6 +159,11 @@ if [ ! -z "$build_with_cuda" ]; then
     echo "opal_warn_on_missing_libcuda = 0" >> $PREFIX/etc/openmpi-mca-params.conf
     echo "setting the mca opal_cuda_support to 0..."
     echo "opal_cuda_support = 0" >> $PREFIX/etc/openmpi-mca-params.conf
+
+    echo "setting the mca pml to ^ucx..."
+    echo "pml = ^ucx" >> $PREFIX/etc/openmpi-mca-params.conf
+    echo "setting the mca osc to ^ucx..."
+    echo "osc = ^ucx" >> $PREFIX/etc/openmpi-mca-params.conf
     
     POST_LINK=$PREFIX/bin/.openmpi-post-link.sh
     cp $RECIPE_DIR/post-link.sh $POST_LINK
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index e6b1d787..5d9054c8 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -16,7 +16,7 @@ source:
     - ompi-8361.diff
 
 build:
-  number: 4
+  number: 5
   # remember to bump the CUDA version in build-mpi.sh too!
   skip: true  # [win or (linux64 and cuda_compiler_version != '10.2') or ((aarch64 or ppc64le) and cuda_compiler_version not in (undefined, "None"))]
 
@@ -27,7 +27,7 @@ outputs:
       run_exports:
         - {{ pin_subpackage('openmpi', min_pin='x.x.x', max_pin='x') }}
       ignore_run_exports_from:
-        - {{ compiler('cuda') }}
+        - {{ compiler('cuda') }}  # [linux64]
     requirements:
       build:
         - {{ compiler('c') }}
@@ -41,11 +41,14 @@ outputs:
         - perl 5.26.2
       host:
         - zlib
+        - ucx 1.9.0  # [linux64]
+        - ucx-proc =*=gpu  # [linux64]
       run:
         - zlib
         - mpi 1.0 openmpi
       run_constrained:
         - cudatoolkit >=9.2  # [linux64]
+        - ucx 1.9.0  # [linux64]
     test:
       script: run_test.sh
       files:
diff --git a/recipe/post-link.sh b/recipe/post-link.sh
index 32421dc8..8a45c74a 100644
--- a/recipe/post-link.sh
+++ b/recipe/post-link.sh
@@ -2,7 +2,16 @@
 
 echo " " >> $PREFIX/.messages.txt
 echo "For Linux 64, Open MPI is built with CUDA awareness but this support is disabled by default." >> $PREFIX/.messages.txt
-echo "To enable it, please set the environmental variable OMPI_MCA_opal_cuda_support=true before" >> $PREFIX/.messages.txt
+echo "To enable it, please set the environment variable OMPI_MCA_opal_cuda_support=true before" >> $PREFIX/.messages.txt
 echo "launching your MPI processes. Equivalently, you can set the MCA parameter in the command line:" >> $PREFIX/.messages.txt
 echo "mpiexec --mca opal_cuda_support 1 ..." >> $PREFIX/.messages.txt
 echo " " >> $PREFIX/.messages.txt
+
+echo "In addition, the UCX support is also built but disabled by default." >> $PREFIX/.messages.txt
+echo "To enable it, first install UCX (conda install -c conda-forge ucx). Then, set the environment" >> $PREFIX/.messages.txt
+echo "variables OMPI_MCA_pml=\"ucx\" OMPI_MCA_osc=\"ucx\" before launching your MPI processes." >> $PREFIX/.messages.txt
+echo "Equivalently, you can set the MCA parameters in the command line:" >> $PREFIX/.messages.txt
+echo "mpiexec --mca pml ucx --mca osc ucx ..." >> $PREFIX/.messages.txt
+echo "Note that you might also need to set UCX_MEMTYPE_CACHE=n for CUDA awareness via UCX." >> $PREFIX/.messages.txt
+echo "Please consult UCX's documentation for detail." >> $PREFIX/.messages.txt
+echo " " >> $PREFIX/.messages.txt