diff --git a/scripts/create_container.sh b/scripts/create_container.sh
index c5c97d9..fcf0787 100755
--- a/scripts/create_container.sh
+++ b/scripts/create_container.sh
@@ -1,55 +1,120 @@
 #!/usr/bin/env bash
 set -euo pipefail
+shopt -s nullglob
 
-# Our local user needs write access to /dev/kvm (best accomplished by
-# adding your user to the kvm group).
-if ! touch /dev/kvm; then
-  echo "Cannot write to /dev/kvm - please verify permissions."
-  exit 1
-fi
+main() {
+    # Our local user needs write access to /dev/kvm (best accomplished by
+    # adding your user to the kvm group).
+    if ! touch /dev/kvm; then
+      echo "Cannot write to /dev/kvm - please verify permissions." >&2
+      exit 1
+    fi
+    
+    # The KVM module needs to be loaded, since our container is unprivileged
+    # and won't be able to do it itself.
+    if ! [[ -d /sys/module/kvm ]]; then
+      echo "kvm module not loaded - please modprobe kvm" >&2
+      exit 1
+    fi
 
-# The KVM module needs to be loaded, since our container is unprivileged
-# and won't be able to do it itself.
-if ! [[ -d /sys/module/kvm ]]; then
-  echo "kvm module not loaded - please modprobe kvm"
-  exit 1
-fi
+    local dockerfile="build/ci/Dockerfile"
+    if ! [[ -f "${dockerfile}" ]]; then
+        echo "Dockerfile not found at path ${dockerfile}. Make sure to run this script from the root of the Monogon checkout." >&2
+        exit 1
+    fi
+    
+    # Rebuild base image purely with no build context (-) ensuring that the
+    # builder image does not contain any other data from the repository.
+    podman build -t monogon-builder - < "${dockerfile}"
 
-# Rebuild base image
-podman build -t monogon-builder build/ci
+    # TODO(serge): stop using pods for the builder, this is a historical artifact.
+    podman pod create --name monogon
+    
+    # Mount bazel root to identical paths inside and outside the container.
+    # This caches build state even if the container is destroyed.
+    #
+    # TODO(serge): do not hardcode this path? This breaks if attempting to use
+    # the build container from multiple Monogon checkouts on disk.
+    local bazel_root="${HOME}/.cache/bazel-monogon"
+    mkdir -p "${bazel_root}"
+    
+    # When IntelliJ's Bazel plugin uses //scripts/bin/bazel to either build targets
+    # or run syncs, it adds a --override_repository flag to the bazel command
+    # line that points @intellij_aspect into a path on the filesystem. This
+    # external repository contains a Bazel Aspect definition which Bazel
+    # executes to provide the IntelliJ Bazel plugin with information about the
+    # workspace / build targets / etc...
+    #
+    # We need to make this path available within the build container. However,
+    # instead of directly pointing into that path on the host, we redirect through
+    # a patched copy of this repository. That patch applies fixes related to the
+    # Monogon codebase in general, not specific to the fact that we're running in a
+    # container.
+    #
+    # What this ends up doing is that the path mounted within the container
+    # looks as if it's a path straight from the host IntelliJ config directory,
+    # but in fact points into a patched copy. It looks weird, but this setup
+    # allows us to let IntelliJ's Bazel integration to trigger Bazel without us
+    # having to replace the override_repository flag that it passes to Bazel.
+    # We at some point used to do that, but parsing and replacing Bazel flags
+    # in the scripts/bin/bazel wrapper script is error prone and fragile.
 
-# Keep this in sync with ci.sh:
+    # Find all IntelliJ installation/config directories.
+    local ij_home_paths=("${HOME}/.local/share/JetBrains/IntelliJIdea"*)
+    # Get the newest one, if any.
+    local ij_home=""
+    if ! [[  ${#ij_home_paths[@]} -eq 0 ]]; then
+        # Reverse sort paths by name, with the first being the newest IntelliJ
+        # installation.
+        IFS=$'\n'
+        local sorted=($(sort -r <<<"${ij_home_paths[*]}"))
+        unset IFS
+        ij_home="${sorted[0]}"
+    fi
 
-podman pod create --name monogon
+    # If we don't have or can't find ij_home, don't bother with attempting to patch anything.
+    # If we do, podman_flags will get populated with extra flags that it will
+    # run with to support IntelliJ/Bazel integration.
+    declare -a podman_flags
+    if [[ -d "${ij_home}" ]]; then
+        echo "IntelliJ found at ${ij_home}, patching and mounting aspect repository."
+        # aspect_orig is the path to the aspect external repository that IntelliJ will
+        # inject into bazel via --override_repository. It is the path that it expects
+        # to be available to Bazel within the container, and also the path that is
+        # directly visible in the host.
+        local aspect_orig="${ij_home}/ijwb/aspect"
+        # aspect_patched is the path to our patched copy of the aspect
+        # repository. We keep this in bazel_root for convenience, as that's a
+        # path that we control on the host anyway, so we can be sure we're not
+        # trampling some other process.
+        local aspect_patched="${bazel_root}/ijwb_aspect"
 
-# Mount bazel root to identical paths inside and outside the container.
-# This caches build state even if the container is destroyed, and
-BAZEL_ROOT=${HOME}/.cache/bazel-monogon
-mkdir -p ${BAZEL_ROOT}
+        # If we already have a patched version of the aspect, remove it.
+        if [[ -d "${aspect_patched}" ]]; then
+            rm -rf "${aspect_patched}"
+        fi
 
-# The Bazel plugin injects a Bazel repository into the sync command line,
-# We need to copy the aspect repository and apply a custom patch.
+        # Copy and patch the aspect.
+        cp -r "${aspect_orig}" "${aspect_patched}"
+        patch -d "${aspect_patched}" -p1 < scripts/patches/bazel_intellij_aspect_filter.patch
 
-# TODO(leo): the IntelliJ path changed to ~/.config on new setups, we should look for that as well
+        # Make podman mount the patched aspect into the original aspect path in the build container.
+        podman_flags+=(-v "${aspect_patched}:${aspect_orig}")
+    else
+        echo "No IntelliJ found, not patching/mounting aspect repository."
+    fi
 
-IJ_HOME=$(echo ${HOME}/.IntelliJIdea* | tr ' ' '\n' | sort | tail -n 1)
-ASPECT_ORIG=${IJ_HOME}/config/plugins/ijwb/aspect
-ASPECT_PATH=${BAZEL_ROOT}/ijwb_aspect
+    podman run -it -d \
+        -v $(pwd):$(pwd):z \
+        -w $(pwd) \
+        --volume="${bazel_root}:${bazel_root}" \
+        --device /dev/kvm \
+        --privileged \
+        --pod monogon \
+        --name=monogon-dev \
+        --net=host \
+        "${podman_flags[@]}" \
+        monogon-builder
+}
 
-if [[ -d "$IJ_HOME" ]]; then
-    echo "IntelliJ found, copying aspect file to Bazel root"
-    rm -rf "$ASPECT_PATH"
-    cp -r "$ASPECT_ORIG" "$ASPECT_PATH"
-    patch -d "$ASPECT_PATH" -p1 < scripts/patches/bazel_intellij_aspect_filter.patch
-fi
-
-podman run -it -d \
-    -v $(pwd):$(pwd):z \
-    -w $(pwd) \
-    --volume=${BAZEL_ROOT}:${BAZEL_ROOT} \
-    --device /dev/kvm \
-    --privileged \
-    --pod monogon \
-    --name=monogon-dev \
-    --net=host \
-    monogon-builder
+main