diff --git a/dockers/base-conda/Dockerfile b/dockers/base-conda/Dockerfile
index 85d5ed345af10..280ab0687ffed 100644
--- a/dockers/base-conda/Dockerfile
+++ b/dockers/base-conda/Dockerfile
@@ -123,7 +123,7 @@ ENV \
     HOROVOD_WITHOUT_TENSORFLOW=1 \
     HOROVOD_WITHOUT_MXNET=1 \
     HOROVOD_WITH_GLOO=1 \
-    HOROVOD_WITHOUT_MPI=1
+    HOROVOD_WITH_MPI=1
 
 RUN \
    HOROVOD_BUILD_CUDA_CC_LIST=${TORCH_CUDA_ARCH_LIST//";"/","} && \
@@ -154,4 +154,5 @@ RUN \
     pip list && \
     python -c "import sys; ver = sys.version_info ; assert f'{ver.major}.{ver.minor}' == '$PYTHON_VERSION', ver" && \
     python -c "import torch; assert torch.__version__.startswith('$PYTORCH_VERSION'), torch.__version__" && \
-    python -c "import horovod.torch"
+    python -c "import horovod.torch" && \
+    python -c "from horovod.torch import nccl_built; nccl_built()"
diff --git a/dockers/base-cuda/Dockerfile b/dockers/base-cuda/Dockerfile
index 739ff591eb062..bf57fb91025fc 100644
--- a/dockers/base-cuda/Dockerfile
+++ b/dockers/base-cuda/Dockerfile
@@ -83,21 +83,21 @@ RUN \
     python ./requirements/adjust-versions.py requirements/extra.txt ${PYTORCH_VERSION} && \
     python ./requirements/adjust-versions.py requirements/examples.txt ${PYTORCH_VERSION} && \
     python -c "print(' '.join([ln for ln in open('requirements/extra.txt').readlines() if 'horovod' in ln]))" > ./requirements/horovod.txt && \
-    python assistant.py requirements_prune_pkgs requirements/examples.txt "horovod" && \
+    python assistant.py requirements_prune_pkgs requirements/extra.txt "horovod" && \
     # Install all requirements \
     pip install -r requirements/devel.txt --no-cache-dir --find-links https://download.pytorch.org/whl/cu${CUDA_VERSION_MM}/torch_stable.html && \
     rm -rf requirements.* && \
     rm assistant.py
 
 RUN \
-   apt-get purge -y cmake && \
-   wget -q https://github.com/Kitware/CMake/releases/download/v3.20.2/cmake-3.20.2.tar.gz && \
-   tar -zxvf cmake-3.20.2.tar.gz && \
-   cd cmake-3.20.2 && \
-   ./bootstrap -- -DCMAKE_USE_OPENSSL=OFF && \
-   make && \
-   make install && \
-   cmake  --version
+    apt-get purge -y cmake && \
+    wget -q https://github.com/Kitware/CMake/releases/download/v3.20.2/cmake-3.20.2.tar.gz && \
+    tar -zxvf cmake-3.20.2.tar.gz && \
+    cd cmake-3.20.2 && \
+    ./bootstrap -- -DCMAKE_USE_OPENSSL=OFF && \
+    make && \
+    make install && \
+    cmake  --version
 
 ENV \
     HOROVOD_CUDA_HOME=$CUDA_TOOLKIT_ROOT_DIR \
@@ -106,15 +106,15 @@ ENV \
     HOROVOD_WITHOUT_TENSORFLOW=1 \
     HOROVOD_WITHOUT_MXNET=1 \
     HOROVOD_WITH_GLOO=1 \
-    HOROVOD_WITHOUT_MPI=1
+    HOROVOD_WITH_MPI=1
 
 RUN \
-   HOROVOD_BUILD_CUDA_CC_LIST=${TORCH_CUDA_ARCH_LIST//";"/","} && \
-   export HOROVOD_BUILD_CUDA_CC_LIST=${HOROVOD_BUILD_CUDA_CC_LIST//"."/""} && \
-   cat ./requirements/horovod.txt && \
-   cmake --version && \
-   pip install --no-cache-dir -r ./requirements/horovod.txt && \
-   rm -rf requirements/
+    HOROVOD_BUILD_CUDA_CC_LIST=${TORCH_CUDA_ARCH_LIST//";"/","} && \
+    export HOROVOD_BUILD_CUDA_CC_LIST=${HOROVOD_BUILD_CUDA_CC_LIST//"."/""} && \
+    cat ./requirements/horovod.txt && \
+    cmake --version && \
+    pip install --no-cache-dir -r ./requirements/horovod.txt && \
+    rm -rf requirements/
 
 RUN \
     CUDA_VERSION_MAJOR=$(python -c "import torch; print(torch.version.cuda.split('.')[0])") && \
@@ -147,4 +147,5 @@ RUN \
     pip list && \
     python -c "import sys; ver = sys.version_info ; assert f'{ver.major}.{ver.minor}' == '$PYTHON_VERSION', ver" && \
     python -c "import torch; assert torch.__version__.startswith('$PYTORCH_VERSION'), torch.__version__" && \
-    python -c "import horovod.torch"
+    python -c "import horovod.torch" && \
+    python -c "from horovod.torch import nccl_built; nccl_built()"