@@ -1,3 +1,5 @@
+# syntax = docker/dockerfile:experimental
+
 # Multistage Dockerfile to build the Splitgraph engine: because of all the compilation of
 # FDWs/libraries needed, we have to download a few hundred MB of dev tooling which we don't
 # need at runtime. So, we define a single "toolchain" image, multiple images that build various
@@ -188,7 +190,7 @@ RUN mkdir -p /splitgraph/splitgraph && touch /splitgraph/splitgraph/__init__.py
 COPY poetry.lock pyproject.toml README.md /splitgraph/
 RUN mkdir /build
 COPY ./engine/build_scripts/build_splitgraph.sh /build/
-RUN /build/build_splitgraph.sh
+RUN --mount=type=cache,id=pip-cache,target=/root/.cache/pip /build/build_splitgraph.sh
 
 # Copy the actual Splitgraph code over at this point.
 COPY ./splitgraph /splitgraph/splitgraph
 
@@ -1,14 +1,17 @@
-#!/bin/bash -e
+#!/bin/bash -ex
 
 # Install the Splitgraph library and the layered querying foreign data wrapper.
 cd /splitgraph
 
-export POETRY_VERSION=1.0.0
+export POETRY_VERSION=1.0.5
 
 curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python3.8
 
 # Install globally (otherwise we'll need to find a way to get Multicorn to see the venv)
 ln -s /usr/bin/python3.8 /usr/bin/python
 source $HOME/.poetry/env
 poetry config virtualenvs.create false
+
+poetry export -f requirements.txt --without-hashes -o requirements.txt && sed -i "/^-e/d" requirements.txt
+pip install -r requirements.txt
 poetry install --no-dev