diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6d842d2389..302a7d3112 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,524 +1,14 @@
-# reusable anchors
-_machine_defaults: &machine_defaults
-  environment:
-    TZ: "/usr/share/zoneinfo/America/Los_Angeles"
-    SCRATCH: "/scratch"
-  machine:
-    image: ubuntu-2204:current
-    docker_layer_caching: true
-  working_directory: /tmp/src/sdcflows
-  resource_class: large
-
-_python_defaults: &python_defaults
-  docker:
-    - image: cimg/python:3.10.9
-  working_directory: /tmp/src/sdcflows
-
-_docker_auth: &docker_auth
-  name: Docker authentication
-  command: |
-    if [[ -n $DOCKER_PAT ]]; then
-      echo "$DOCKER_PAT" | docker login -u $DOCKER_USER --password-stdin
-    fi
-
-_setup_docker_registry: &setup_docker_registry
-  name: Set up Docker registry
-  command: |
-    if [[ -f /tmp/images/registry.tar.gz ]]; then
-      echo "Loading saved registry image"
-      docker load < /tmp/images/registry.tar.gz
-    else
-      echo "Pulling registry image from DockerHub"
-      docker pull registry:2
-    fi
-    docker run -d -p 5000:5000 --restart=always --name=registry \
-        -v /tmp/docker:/var/lib/registry registry:2
-
-_pull_from_registry: &pull_from_registry
-  name: Pull and tag image from local registry
-  command: |
-    docker pull localhost:5000/sdcflows
-    docker tag localhost:5000/sdcflows nipreps/sdcflows:latest
-
 version: 2.1
-orbs:
-  docker: circleci/docker@2.2.0
-  codecov: codecov/codecov@3.2.4
 
 jobs:
-  cache_test_data:
-    docker: # executor type
-      - image: nipreps/miniconda:py39_2209.01
-        auth:
-          username: $DOCKER_USER
-          password: $DOCKER_PAT
-
-    working_directory: /tmp/data
-    environment:
-      - TEMPLATEFLOW_HOME: /tmp/templateflow
-    steps:
-      - checkout:
-          path: /tmp/src/sdcflows
-
-      - run:
-          name: Configure git (pacify datalad)
-          command: |
-            git config --global user.name "First Last"
-            git config --global user.email "email@domain.com"
-
-      - restore_cache:
-          keys:
-            - data-v6-{{ .Branch }}-{{ .Revision }}
-            - data-v6--{{ .Revision }}
-            - data-v6-{{ .Branch }}-
-            - data-v6-main-
-            - data-v6-
-
-      - run:
-          name: Ensure some templates are cached
-          command: |
-            python -c "from templateflow import api as tfapi; \
-                       tfapi.get('MNI152NLin2009cAsym', resolution=2, desc='brain', suffix='mask'); \
-                       tfapi.get('MNI152NLin2009cAsym', resolution=2, desc='fMRIPrep', suffix='boldref');"
-
-      - run:
-          name: Install ds001600
-          command: |
-            datalad install -r https://github.com/nipreps-data/ds001600.git
-            datalad update -r --merge -d ds001600/
-            datalad get -r -d ds001600/ ds001600/sub-1/
-
-      - run:
-          name: Install HCP/sub-101006
-          command: |
-            datalad install -r https://github.com/nipreps-data/HCP101006.git
-            datalad update -r --merge -d HCP101006/
-            datalad get -r -d HCP101006
-
-      - run:
-          name: Install ds001771
-          command: |
-            datalad install -r https://github.com/nipreps-data/ds001771.git
-            datalad update -r --merge -d ds001771/
-            datalad get -r -d ds001771/ ds001771/sub-36/*
-            datalad get -r -d ds001771/derivatives ds001771/derivatives/openneuro/sub-36/*
-
-      - run:
-          name: Install ds000206
-          command: |
-            datalad install -r https://github.com/nipreps-data/ds000206.git
-            datalad update -r --merge -d ds000206/
-            datalad get -r -d ds000206/ ds000206/sub-05/*
-
-      - run:
-          name: Install ds000054
-          command: |
-            datalad install -r https://github.com/nipreps-data/ds000054.git
-            datalad update -r --merge -d ds000054/
-            datalad get -r -J 2 -d ds000054/ ds000054/* ds000054/derivatives/*
-
-      - run:
-          name: Install Brain extraction tests
-          command: |
-            datalad install -r https://gin.g-node.org/nipreps-data/brain-extraction-tests
-            datalad update --merge -d brain-extraction-tests/
-            datalad get -r -J 2 -d brain-extraction-tests
-
-      - run:
-          name: Install HCPh fieldmaps
-          command: |
-            datalad install -r https://github.com/nipreps-data/hcph-pilot_fieldmaps.git
-            datalad update -r --merge -d hcph-pilot_fieldmaps/
-            datalad get -r -J 2 -d hcph-pilot_fieldmaps/ hcph-pilot_fieldmaps/*
-
-      - save_cache:
-          key: data-v6-{{ .Branch }}-{{ .Revision }}
-          paths:
-            - /tmp/data
-            - /tmp/templateflow
-
-      - restore_cache:
-          keys:
-            - freesurfer-v0-{{ .BuildNum }}
-            - freesurfer-v0-
-      - run:
-          name: Pull FreeSurfer down
-          command: |
-            if [[ ! -d /tmp/freesurfer ]]; then
-              curl -sSL https://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/6.0.1/freesurfer-Linux-centos6_x86_64-stable-pub-v6.0.1.tar.gz | tar zxv --no-same-owner -C /tmp \
-                   --exclude='freesurfer/diffusion' \
-                   --exclude='freesurfer/docs' \
-                   --exclude='freesurfer/fsfast' \
-                   --exclude='freesurfer/lib/cuda' \
-                   --exclude='freesurfer/lib/qt' \
-                   --exclude='freesurfer/matlab' \
-                   --exclude='freesurfer/mni/share/man' \
-                   --exclude='freesurfer/subjects/fsaverage_sym' \
-                   --exclude='freesurfer/subjects/fsaverage3' \
-                   --exclude='freesurfer/subjects/fsaverage4' \
-                   --exclude='freesurfer/subjects/cvs_avg35' \
-                   --exclude='freesurfer/subjects/cvs_avg35_inMNI152' \
-                   --exclude='freesurfer/subjects/bert' \
-                   --exclude='freesurfer/subjects/lh.EC_average' \
-                   --exclude='freesurfer/subjects/rh.EC_average' \
-                   --exclude='freesurfer/subjects/sample-*.mgz' \
-                   --exclude='freesurfer/subjects/V1_average' \
-                   --exclude='freesurfer/trctrain'
-              echo "b2VzdGViYW5Ac3RhbmZvcmQuZWR1CjMwNzU2CiAqQ1MzYkJ5VXMxdTVNCiBGU2kvUGJsejJxR1V3Cg==" | base64 -d > /tmp/freesurfer/license.txt
-            else
-              echo "FreeSurfer was cached."
-              circleci step halt
-            fi
-      - save_cache:
-          key: freesurfer-v0-{{ .BuildNum }}
-          paths:
-            - /tmp/freesurfer
-
-  build_n_pytest:
-    <<: *machine_defaults
-    working_directory: /tmp/tests
+  empty:
+    machine:
+      image: ubuntu-2204:current
     steps:
-      - restore_cache:
-          keys:
-            - build-v2-{{ .Branch }}-{{ epoch }}
-            - build-v2-{{ .Branch }}-
-            - build-v2-master-
-            - build-v2-
-          paths:
-            - /tmp/docker
-      - docker/install-docker-credential-helper
-      - run: *docker_auth
-      - run: *setup_docker_registry
-      - run:
-          name: Pull Ubuntu/jammy image
-          command: |
-            set +e
-            docker pull localhost:5000/ubuntu
-            success=$?
-            set -e
-            if [[ "$success" = "0" ]]; then
-                echo "Pulling from local registry"
-                docker tag localhost:5000/ubuntu ubuntu:jammy
-            else
-                echo "Pulling from Docker Hub"
-                docker pull ubuntu:jammy
-                docker tag ubuntu:jammy localhost:5000/ubuntu
-                docker push localhost:5000/ubuntu
-            fi
-      - run:
-          name: Pull SDCFlows Docker image
-          command: |
-            set +e
-            docker pull localhost:5000/sdcflows
-            success=$?
-            set -e
-            if [[ "$success" = "0" ]]; then
-                echo "Pulling from local registry"
-                docker tag localhost:5000/sdcflows nipreps/sdcflows:latest
-                docker tag localhost:5000/sdcflows nipreps/sdcflows
-            else
-                echo "Pulling from Docker Hub"
-                docker pull nipreps/sdcflows:latest
-            fi
-      - checkout:
-          path: /tmp/src/sdcflows
-      - run:
-          name: Build Docker image
-          working_directory: /tmp/src/sdcflows
-          no_output_timeout: 60m
-          command: |
-            export PY3=$( pyenv versions | awk '/^\* 3/ { print $2 }' )
-            pyenv local $PY3
-            python3 -m pip install -U build hatch hatchling pip twine docutils
-
-            # Get version, update files.
-            THISVERSION=$( python3 -m hatch version | tail -n1 | xargs )
-            if [[ ${THISVERSION:0:1} == "0" ]] ; then
-              echo "WARNING: latest git tag could not be found"
-              echo "Please, make sure you fetch all tags from upstream with"
-              echo "the command ``git fetch --tags --verbose`` and push"
-              echo "them to your fork with ``git push origin --tags``"
-            fi
-            # Build docker image
-            docker build --rm \
-                --cache-from=nipreps/sdcflows \
-                -t nipreps/sdcflows:latest \
-                --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
-                --build-arg VCS_REF=`git rev-parse --short HEAD` \
-                --build-arg VERSION="${CIRCLE_TAG:-$THISVERSION}" . \
-                | tee build-output.log
-            echo "${CIRCLE_TAG:-$THISVERSION}" >> /tmp/.local-version.txt
-      - run:
-          name: Check Docker image
-          working_directory: /tmp/src/sdcflows
-          command: |
-            export PY3=$( pyenv versions | awk '/^\* 3/ { print $2 }' )
-            pyenv local $PY3
-            # Get version, update files.
-            THISVERSION=$( python3 -m hatch version | tail -n1 | xargs )
-            BUILT_VERSION=$( docker run --rm --entrypoint=python nipreps/sdcflows:latest -c "import sdcflows; print(sdcflows.__version__)" )
-            BUILT_VERSION=${BUILT_VERSION%$'\r'}
-            echo "VERSION: \"$THISVERSION\""
-            echo "BUILT: \"$BUILT_VERSION\""
-            set -e
-            test "$BUILT_VERSION" = "$THISVERSION"
-      - run:
-          name: Docker push to local registry
-          no_output_timeout: 40m
-          command: |
-            docker tag nipreps/sdcflows:latest localhost:5000/sdcflows
-            docker push localhost:5000/sdcflows
-      - run:
-          name: Docker registry garbage collection
-          command: |
-            docker exec -it registry /bin/registry garbage-collect --delete-untagged \
-                /etc/docker/registry/config.yml
-      - save_cache:
-          key: build-v2-{{ .Branch }}-{{ epoch }}
-          paths:
-            - /tmp/docker
-
-      - restore_cache:
-          keys:
-            - freesurfer-v0-{{ .BuildNum }}
-            - freesurfer-v0-
-      - restore_cache:
-          keys:
-            - data-v6-{{ .Branch }}-{{ .Revision }}
-            - data-v6--{{ .Revision }}
-            - data-v6-{{ .Branch }}-
-            - data-v6-main-
-            - data-v6-
-
-      - restore_cache:
-          keys:
-            - workdir-v3-{{ .Branch }}-
-            - workdir-v3-master-
-            - workdir-v3-
-      - run:
-          name: Refreshing cached intermediate results
-          working_directory: /tmp/src/sdcflows
-          command: |
-            COMMIT_MSG=$( git log --format=oneline -n 1 $CIRCLE_SHA1 )
-            set +e
-            do_refresh="$( echo "${COMMIT_MSG}" | grep -i -E '\[refresh[ _]?cache\]' )"
-            set -e
-            if [[ "x${do_refresh}" = "x" ]]; then
-              echo "Did not refresh the workdir."
-            else
-              wget --retry-connrefused --waitretry=5 --read-timeout=20 --timeout=15 -t 0 -q \
-                  -O /tmp/data/workdir.tar.gz "https://files.osf.io/v1/resources/9sy2a/providers/osfstorage/5dcabd60a1cd9e000c751b3c"
-              rm -rf /tmp/work
-              mkdir -p /tmp/work
-              pushd /tmp/work
-              tar xzfv /tmp/data/workdir.tar.gz --strip 1
-              popd
-            fi
-
-            wipe_dir=$( echo "${COMMIT_MSG}" | sed -n 's/.*\[wipe \([a-zA-Z0-9_\*]*\)\].*/\1/p' )
-            if [[ "x${wipe_dir}" != "x" ]]; then
-              path=/tmp/work/${wipe_dir}
-              echo "Found tag [wipe ${wipe_dir}] - clearing up $path ..."
-              rm -rf ${path}
-            fi
-      - run:
-          name: Run tests
-          no_output_timeout: 2h
-          command: |
-            mkdir -p /tmp/work
-            docker run -it --rm -w /src/sdcflows \
-                -e TEST_WORK_DIR=/work \
-                -e TEST_DATA_HOME=/data \
-                -e TEST_OUTPUT_DIR=/out \
-                -e COVERAGE_FILE=/out/.coverage \
-                -e FS_LICENSE=/opt/freesurfer/license.txt \
-                -v /tmp/data:/data:ro \
-                -v /tmp/src:/src \
-                -v /tmp/tests:/out \
-                -v /tmp/work:/work \
-                -v /tmp/freesurfer:/opt/freesurfer:ro  \
-                -v /tmp/templateflow:/home/sdcflows/.cache/templateflow \
-                nipreps/sdcflows:latest \
-                pytest -v --junit-xml=/out/pytest.xml \
-                       --cov sdcflows --cov-report xml:/out/unittests.xml \
-                       -n auto sdcflows/
-      - save_cache:
-          key: workdir-v3-{{ .Branch }}-{{ .BuildNum }}
-          paths:
-            - /tmp/work
-      - store_artifacts:
-          path: /tmp/tests
-      - store_test_results:
-          path: /tmp/tests
-
-      - codecov/upload:
-          file: /tmp/tests/unittests.xml
-          flags: unittests
-
-  build_docs:
-    <<: *python_defaults
-    working_directory: /tmp/gh-pages
-    environment:
-      - FSLOUTPUTTYPE: NIFTI
-      - SUBJECTS_DIR: /tmp/subjects
-    steps:
-      - checkout
-      - run:
-          name: Create subjects folder
-          command: mkdir -p $SUBJECTS_DIR
-      - run:
-          name: Install Graphviz & pandoc
-          command: |
-            sudo apt-get update -y
-            sudo apt-get install -y --no-install-recommends graphviz pandoc texlive
-      - run:
-          name: Install deps
-          command: |
-            python -m venv /tmp/venv
-            source /tmp/venv/bin/activate
-            python -m pip install -U build hatch hatchling pip twine docutils
-            python -m pip install .[docs]
-      - run:
-          name: Build only this commit
-          command: |
-            source /tmp/venv/bin/activate
-            python -m hatch version | tail -n1 | xargs
-            BRANCH=$( echo $CIRCLE_BRANCH | sed 's+/+_+g' )
-            python -c "from templateflow.api import get; get('MNI152NLin2009cAsym', desc='brain', resolution=1, suffix='T1w')"
-            make -C docs SPHINXOPTS="-W -v" BUILDDIR="$HOME/docs" OUTDIR=${CIRCLE_TAG:-$BRANCH} html
-      - store_artifacts:
-          path: ~/docs/
-
-  deploy_docker:
-    <<: *machine_defaults
-    steps:
-      - restore_cache:
-          keys:
-            - build-v2-{{ .Branch }}-{{ epoch }}
-            - build-v2-{{ .Branch }}-
-            - build-v2-master-
-            - build-v2-
-          paths:
-            - /tmp/docker
-      - docker/install-docker-credential-helper
-      - run: *docker_auth
-      - run: *setup_docker_registry
-      - run: *pull_from_registry
-      - run:
-          name: Deploy to Docker Hub
-          no_output_timeout: 40m
-          command: |
-            if [[ -n "$DOCKER_PAT" ]]; then
-              docker push nipreps/sdcflows:latest
-              docker tag nipreps/sdcflows nipreps/sdcflows:$CIRCLE_TAG
-              docker push nipreps/sdcflows:$CIRCLE_TAG
-            fi
-
-  test_package:
-    <<: *python_defaults
-    steps:
-      - checkout
-      - run:
-          name: Prepare environment & build
-          command: |
-            python -m venv /tmp/buildenv
-            source /tmp/buildenv/bin/activate
-            python3 -m pip install -U build hatch hatchling pip twine docutils
-            python3 -m build
-            twine check dist/sdcflows*
-      - store_artifacts:
-          path: /tmp/src/sdcflows/dist
-      - persist_to_workspace:
-          root: /tmp/src/sdcflows
-          paths: dist
-
-      - run:
-          name: Validate version
-          command: |
-            source /tmp/buildenv/bin/activate
-            THISVERSION=$( python -m hatch version | tail -n1 | xargs )
-            python -m pip install dist/*.whl
-            mkdir empty
-            cd empty
-            INSTALLED=$( python -c 'import sdcflows; print(sdcflows.__version__)' )
-            test "${CIRCLE_TAG:-$THISVERSION}" == "$INSTALLED"
-
-  deploy_pypi:
-    <<: *python_defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/src/sdcflows
-      - run:
-          name: Upload to Pypi
-          command: |
-            python -m pip install twine
-            python -m twine check dist/*
-            python -m twine upload dist/* --non-interactive
+      - run: echo Not doing nothing.
 
 workflows:
   version: 2
   build_deploy:
     jobs:
-      - cache_test_data:
-          context:
-            - nipreps-common
-            - fs-license
-          filters:
-            branches:
-              ignore:
-                - /docs?\/.*/
-            tags:
-              only: /.*/
-
-      - build_n_pytest:
-          requires:
-            - cache_test_data
-          filters:
-            branches:
-              ignore:
-                - /docs?\/.*/
-            tags:
-              only: /.*/
-
-      - test_package:
-          context:
-            - nipreps-common
-          filters:
-            branches:
-              ignore:
-                - /docs?\/.*/
-                - /tests?\/.*/
-            tags:
-              only: /.*/
-
-      - deploy_pypi:
-          context:
-            - nipreps-common
-          requires:
-            - build_docs
-            - test_package
-            - build_n_pytest
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /.*/
-
-      - deploy_docker:
-          context:
-            - nipreps-common
-          requires:
-            - deploy_pypi
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /.*/
-
-      - build_docs:
-          filters:
-            branches:
-              ignore:
-                - /tests?\/.*/
-            tags:
-              only: /.*/
+      - empty