diff --git a/Dockerfile b/Dockerfile
index abe8f99bbf..8a655c6c13 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,18 +14,18 @@ ARG PYTORCH_IMAGE=nvcr.io/nvidia/pytorch:20.10-py3
 FROM ${PYTORCH_IMAGE} as base
 
 WORKDIR /opt/monai
-COPY . .
-
 ENV PATH=/opt/tools:$PATH
 
-# ignore "torch" in requirements.txt, as we prefer PYTORCH_IMAGE
-RUN cp requirements.txt req.bak \
-  && awk '!/torch/' requirements.txt > tmp && mv tmp requirements.txt \
-  && python -m pip install --no-cache-dir -U pip wheel \
-  && python -m pip install --no-cache-dir -r requirements-dev.txt \
-  && mv req.bak requirements.txt \
-  && BUILD_MONAI=1 FORCE_CUDA=1 python setup.py develop
-# restored the original requirements.txt so that the version string is clean
+# install full deps
+COPY requirements.txt requirements-min.txt requirements-dev.txt /tmp/
+RUN cp /tmp/requirements.txt /tmp/req.bak \
+  && awk '!/torch/' /tmp/requirements.txt > /tmp/tmp && mv /tmp/tmp /tmp/requirements.txt \
+  && python -m pip install --no-cache-dir --use-feature=2020-resolver -r /tmp/requirements-dev.txt
+
+# compile ext and remove temp files
+COPY . .
+RUN BUILD_MONAI=1 FORCE_CUDA=1 python setup.py develop \
+  && rm -rf builds __pycache__
 
 # NGC Client
 WORKDIR /opt/tools