diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index bceba9db..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,198 +0,0 @@
-aliases:
-  - &is_main_branch
-      equal: [ main, << pipeline.git.branch >> ]
-
-commands:
-  print_rust_version_info:
-    description: Rust toolchain version info
-    steps:
-      - run:
-          name: Rust version info
-          command: |
-            rustup show
-            rustc --version
-            cargo --version
-            rustup --version
-
-  install_rustup:
-    description: Install rustup
-    steps:
-      - run:
-          name: Install rustup
-          command: |
-            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain=none
-
-  init_opam:
-    description: Initialize opam
-    steps:
-      - run:
-          name: Init opam
-          command: |
-            opam init --compiler=5.1.1 --disable-sandboxing -y
-
-  setup_ocaml_tp:
-    description: Write symlinks shim/third-party/ocaml
-    steps:
-      - run:
-          name: Setup third-party/ocaml directory
-          command: |
-            # Assumes OPAM_SWITCH_PREFIX has been set already.
-            ./ocaml-setup.sh
-
-  setup_linux_env:
-    description: Linux installation steps
-    steps:
-      - install_rustup
-      - print_rust_version_info
-      - run:
-          name: Aptitude install
-          command: |
-            sudo apt-get update
-            sudo apt-get install libssl-dev cmake clang lld opam zstd
-      - init_opam
-      - run:
-          name: Set environment variables
-          command: |
-            echo 'source "$HOME"/.cargo/env' >> "$BASH_ENV"
-            echo 'eval $(opam env)' >> "$BASH_ENV"
-      - setup_ocaml_tp
-
-  setup_macos_env:
-    description: macOS installation steps
-    steps:
-      - install_rustup
-      - print_rust_version_info
-      - run:
-          name: Brew install
-          command: |
-            brew install cmake coreutils opam llvm zstd wget
-      - init_opam
-      - run:
-          name: Set environment variables
-          command: |
-            echo 'source "$HOME"/.cargo/env' >> "$BASH_ENV"
-            echo 'export PATH=/usr/local/opt/llvm/bin:/opt/homebrew/bin:"$PATH"' >> "$BASH_ENV"
-            echo 'eval $(opam env)' >> "$BASH_ENV"
-      - setup_ocaml_tp
-
-  cargo:
-    description: Use cargo to build & test
-    steps:
-      - run:
-          name: Cargo build & test
-          command: |
-            cargo build
-            cargo test
-
-  install_buck:
-    description: Download latest buck2
-    parameters:
-      triple:
-        type: string
-    steps:
-      - run:
-          name: Install buck
-          command: |
-            wget https://github.com/facebook/buck2/releases/download/latest/buck2-<<parameters.triple>>.zst
-            zstd -d buck2-<<parameters.triple>>.zst -o buck2
-            chmod +x buck2
-            sudo ln -s $(pwd)/buck2 /usr/local/bin/buck2
-
-
-  install_reindeer:
-    description: Use cargo to install reindeer
-    steps:
-      - run:
-          name: Install reindeer
-          command: |
-            cargo install --git https://github.com/facebookincubator/reindeer.git reindeer --force
-
-  reindeer:
-    description: Use reindeer to vendor & buckify rust 3rd-party deps
-    steps:
-      - run:
-          name: Run reindeer steps
-          command: |
-            reindeer --third-party-dir shim/third-party/rust buckify
-
-  buck_tp:
-    description: Use buck to build third-party deps
-    steps:
-      - run:
-          name: Build 3rd party rust.
-          command: |
-            buck2 build shim//third-party/... -v 2
-
-  buck_ocamlrep:
-    description: Use buck to build ocamlrep
-    steps:
-      - run:
-          name: Build ocamlrep.
-          command: |
-            buck2 build root//... -v 2
-
-version: 2.1
-orbs:
-  rust: circleci/rust@1.6.0
-jobs:
-  linux-cargo-build-and-test:
-    description: |
-      Linux cargo build & test
-    docker:
-      - image: cimg/rust:1.65.0
-    resource_class: xlarge
-    steps:
-      - checkout
-      - setup_linux_env
-      - cargo
-
-  macos-cargo-build-and-test:
-    description: |
-      macOS cargo build & test
-    macos:
-      xcode: "14.2.0"
-    resource_class: macos.m1.medium.gen1
-    steps:
-      - checkout
-      - setup_macos_env
-      - cargo
-
-  linux-buck-build:
-    description: |
-      Linux buck build
-    docker:
-      - image: cimg/rust:1.65.0
-    resource_class: xlarge
-    steps:
-      - checkout
-      - setup_linux_env
-      - install_buck:
-          triple: "x86_64-unknown-linux-gnu"
-      - install_reindeer
-      - reindeer
-      - buck_tp
-      - buck_ocamlrep
-
-  macos-buck-build:
-    description: |
-      macOS buck build
-    macos:
-      xcode: "14.2.0"
-    resource_class: macos.m1.medium.gen1
-    steps:
-      - checkout
-      - setup_macos_env
-      - install_buck:
-          triple: "aarch64-apple-darwin"
-      - install_reindeer
-      - reindeer
-      - buck_tp
-      - buck_ocamlrep
-
-workflows:
-  build-test:
-    jobs:
-      - linux-cargo-build-and-test
-      - macos-cargo-build-and-test
-      - linux-buck-build
-      - macos-buck-build