diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index 18cff7054..000000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,78 +0,0 @@
-version: "{build} ~ {branch}"
-
-os: Visual Studio 2017
-
-branches:
-  only:
-    - staging
-    - trying
-    - master
-
-environment:
-  matrix:
-    - CHANNEL: stable
-      ARCH: x86_64
-      ABI: msvc
-      TARGET: x86_64-pc-windows-msvc
-
-cache:
-  - 'C:\Users\appveyor\.cargo'
-  - target
-
-install:
-  # Install LLVM
-  - mkdir C:\projects\deps
-  - cd C:\projects\deps
-  - appveyor DownloadFile https://github.com/wasmerio/windows-llvm-build/releases/download/v8.0.0/llvm-8.0.0-install.zip -FileName llvm-8.0.0-install.zip
-  - 7z x llvm-8.0.0-install.zip
-  - C:\projects\deps\llvm-8.0.0-install\bin\llvm-config.exe --version
-  - set "LLVM_SYS_80_PREFIX=C:\projects\deps\llvm-8.0.0-install"
-  - cd "%APPVEYOR_BUILD_FOLDER%"
-
-  # Install Rust
-  # uncomment these lines if the cache is cleared, or if we must re-install rust for some reason
-  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
-  - rustup-init.exe -yv --default-host %target%
-  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
-  - rustup default stable-%target%
-  - rustup update
-  - rustc -vV
-  - cargo -vV
-
-  # Install InnoSetup
-  - appveyor-retry appveyor DownloadFile https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2017-08-22-is.exe
-  - 2017-08-22-is.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-
-  - set PATH="C:\Program Files (x86)\Inno Setup 5";%PATH%
-# uncomment to RDP to appveyor
-#  - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
-
-build_script:
-  - cargo build --release --verbose --features backend-llvm
-  - cargo build --release --manifest-path lib/runtime-c-api/Cargo.toml
-
-test_script:
-  - cargo test --manifest-path lib/spectests/Cargo.toml --release --features clif -- --nocapture
-
-before_deploy:
-  - appveyor PushArtifact target\release\wasmer_runtime_c_api.dll
-  - git submodule init
-  - git submodule update
-  - cargo build --release --manifest-path wapm-cli/Cargo.toml --features "telemetry update-notifications"
-  - cd ./src/installer
-  - iscc wasmer.iss
-  - copy /y .\WasmerInstaller.exe ..\..\WasmerInstaller-%APPVEYOR_REPO_TAG_NAME%.exe
-  - appveyor PushArtifact ..\..\WasmerInstaller-%APPVEYOR_REPO_TAG_NAME%.exe
-  - cd ..\..\
-
-matrix:
-  fast_finish: true
-
-deploy:
-  description: 'WasmerInstaller'
-  artifact: /.*\.exe/
-  auth_token:
-    secure: BbreGNDJy20922za7OhJG5TERzfX+dJSBQwttNTJkLvszbqMov6hhAtRb3P45hpf
-  provider: GitHub
-  on:
-    branch: master
-    appveyor_repo_tag: true
diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 5abff64df..000000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,439 +0,0 @@
-run_with_build_env_vars: &run_with_build_env_vars
-  environment:
-    LLVM_SYS_80_PREFIX: /home/circleci/project/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-16.04/
-
-run_install_dependencies: &run_install_dependencies
-  run:
-    name: install dependencies
-    command: |
-      sudo apt-get install -y cmake
-      curl -O https://releases.llvm.org/8.0.0/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz
-      tar xf clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz
-
-version: 2
-jobs:
-  changelog:
-    docker:
-      - image: docker:stable-git
-    steps:
-      - checkout
-      - run:
-          command: ! git diff --exit-code CHANGELOG.md
-
-  # Job used for testing
-  lint:
-    docker:
-      - image: circleci/rust:latest
-    <<: *run_with_build_env_vars
-    steps:
-      - checkout
-      - run:
-          name: "Pull Submodules"
-          command: |
-            git submodule update --init
-      - restore_cache:
-          keys:
-            - v8-lint-{{ arch }}-{{ checksum "Cargo.lock" }}
-      - <<: *run_install_dependencies
-      - run:
-          name: Install lint deps
-          command: |
-            git config --global --unset url."ssh://git@github.com".insteadOf || true
-            # rustup toolchain install nightly-2019-06-10
-            # rustup default nightly-2019-06-10
-            rustup component add rustfmt
-            rustup component add clippy || cargo install --git https://github.com/rust-lang/rust-clippy/ --force clippy
-      - run:
-          name: Execute lints
-          command: |
-            cargo fmt --all -- --check
-      - save_cache:
-          paths:
-            - /usr/local/cargo/registry
-            - target/debug/.fingerprint
-            - target/debug/build
-            - target/debug/deps
-          key: v8-lint-{{ arch }}-{{ checksum "Cargo.lock" }}
-
-  test-stable:
-    docker:
-      - image: circleci/rust:1.36
-    <<: *run_with_build_env_vars
-    steps:
-      - checkout
-      - run:
-          name: "Pull Submodules"
-          command: |
-            git submodule update --init
-      - restore_cache:
-          keys:
-            - v8-test-cargo-cache-linux-stable-{{ arch }}-{{ checksum "Cargo.lock" }}
-      - <<: *run_install_dependencies
-      - run:
-          name: Test everything (except singlepass)
-          command: |
-            make cranelift
-            make llvm
-            make test-rest
-      - run:
-          name: Integration Tests
-          command: make integration-tests
-      - save_cache:
-          paths:
-            - /usr/local/cargo/registry
-            - target/release/.fingerprint
-            - target/release/build
-            - target/release/deps
-          key: v8-test-cargo-cache-linux-stable-{{ arch }}-{{ checksum "Cargo.lock" }}
-
-  test:
-    docker:
-      - image: circleci/rust:latest
-    <<: *run_with_build_env_vars
-    steps:
-      - checkout
-      - run:
-          name: "Pull Submodules"
-          command: |
-            git submodule update --init
-      - restore_cache:
-          keys:
-            - v8-test-cargo-cache-linux-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-      - <<: *run_install_dependencies
-      - run: rustup default nightly-2019-06-10
-      - run:
-          name: Tests
-          command: make test
-      - run:
-          name: Debug flag checked
-          command: |
-            cargo check --features "debug" --release
-      - run:
-          name: Check
-          command: |
-            make check
-      - run:
-          name: Integration Tests
-          command: make integration-tests
-      - save_cache:
-          paths:
-            - /usr/local/cargo/registry
-            - target/release/.fingerprint
-            - target/release/build
-            - target/release/deps
-          key: v8-test-cargo-cache-linux-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-
-  test-rust-example:
-    docker:
-      - image: circleci/rust:latest
-    <<: *run_with_build_env_vars
-    steps:
-      - checkout
-      - run:
-          name: "Check Wasmer Rust example"
-          command: |
-            git clone https://github.com/wasmerio/wasmer-rust-example
-            rustup default stable
-            rustup target add wasm32-unknown-unknown
-            cd wasmer-rust-example
-            cd wasm-sample-app
-            cargo build --release
-            cd ..
-            sed -i 's/wasmer-runtime.*/wasmer-runtime = \{ path  = "..\/lib\/runtime" \}/g' Cargo.toml
-            cargo run
-            cargo test
-
-  test-macos:
-    macos:
-      xcode: "9.0"
-    steps:
-      - checkout
-      - run:
-          name: "Pull Submodules"
-          command: |
-            git submodule update --init
-      - restore_cache:
-          keys:
-            - v8-cargo-cache-darwin-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-      - run:
-          name: Install crate dependencies
-          command: |
-            # Installing cmake outside of brew to improve speed
-            curl -O https://cmake.org/files/v3.4/cmake-3.4.1-Darwin-x86_64.tar.gz
-            tar xf cmake-3.4.1-Darwin-x86_64.tar.gz
-            export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
-            # Installing LLVM outside of brew
-            curl -O https://releases.llvm.org/8.0.0/clang+llvm-8.0.0-x86_64-apple-darwin.tar.xz
-            tar xf clang+llvm-8.0.0-x86_64-apple-darwin.tar.xz
-      - run:
-          name: Install Rust
-          command: |
-            curl -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly-2019-06-10
-            export PATH="$HOME/.cargo/bin:$PATH"
-            cargo --version
-      - run:
-          name: Tests
-          command: |
-            export PATH="$HOME/.cargo/bin:$PATH"
-            export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
-            export LLVM_SYS_80_PREFIX="`pwd`/clang+llvm-8.0.0-x86_64-apple-darwin/"
-            # We increase the ulimit for fixing cargo unclosed files in mac
-            ulimit -n 8000
-            sudo sysctl -w kern.maxfiles=655360 kern.maxfilesperproc=327680
-            make test
-      - run:
-          name: Check
-          command: |
-            export PATH="$HOME/.cargo/bin:$PATH"
-            export LLVM_SYS_80_PREFIX="`pwd`/clang+llvm-8.0.0-x86_64-apple-darwin/"
-            make check
-      - run:
-          name: Integration Tests
-          command: |
-            export PATH="$HOME/.cargo/bin:$PATH"
-            export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
-            export LLVM_SYS_80_PREFIX="`pwd`/clang+llvm-8.0.0-x86_64-apple-darwin/"
-            make integration-tests
-      - save_cache:
-          paths:
-            - ~/.cargo/registry/
-            - target/release/.fingerprint
-            - target/release/build
-            - target/release/deps
-          key: v8-cargo-cache-darwin-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-
-  test-and-build:
-    docker:
-      - image: circleci/rust:latest
-    steps:
-      - checkout
-      - run:
-          name: "Pull Submodules"
-          command: |
-            git submodule update --init
-      - run:
-          name: "Pull dependencies"
-          command: |
-            git submodule init
-            git submodule update
-      - restore_cache:
-          keys:
-            - v8-cargo-cache-linux-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-      - run:
-          name: Install dependencies
-          command: |
-            sudo apt-get install -y cmake
-            curl -O https://releases.llvm.org/8.0.0/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz
-            tar xf clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz
-      - run: rustup default nightly-2019-06-10
-      - run:
-          name: Tests
-          command: |
-            export LLVM_SYS_80_PREFIX="`pwd`/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-16.04/"
-            make test
-      - run:
-          name: Release Build
-          command: |
-            export LLVM_SYS_80_PREFIX="`pwd`/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-16.04/"
-            make release
-            cargo build --release --manifest-path wapm-cli/Cargo.toml --features "telemetry update-notifications"
-            mkdir -p artifacts
-            VERSION=$(cargo pkgid | cut -d# -f2 | cut -d: -f2)
-            # GIT_VERSION=$(git describe --exact-match --tags)
-            echo "${VERSION}" >> artifacts/version
-            echo "${CIRCLE_TAG}" >> artifacts/git_version
-            make build-install
-            cp ./wasmer.tar.gz ./artifacts/$(./scripts/binary-name.sh)
-      - run:
-          name: Dynamic library
-          command: |
-            cargo build --release --manifest-path lib/runtime-c-api/Cargo.toml
-            cp target/release/libwasmer_runtime_c_api.so ./artifacts
-      - persist_to_workspace:
-          root: .
-          paths:
-            - artifacts
-      - save_cache:
-          paths:
-            - /usr/local/cargo/registry
-            - target/release/.fingerprint
-            - target/release/build
-            - target/release/deps
-            - wapm-cli/target/release/.fingerprint
-            - wapm-cli/target/release/build
-            - wapm-cli/target/release/deps
-          key: v8-cargo-cache-linux-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-
-  test-and-build-macos:
-    macos:
-      xcode: "9.0"
-    steps:
-      - checkout
-      - run:
-          name: "Pull dependencies"
-          command: |
-            git submodule init
-            git submodule update
-      - restore_cache:
-          keys:
-            - v8-cargo-cache-darwin-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-      - run:
-          name: Install crate dependencies
-          command: |
-            # Installing cmake outside of brew to improve speed
-            curl -O https://cmake.org/files/v3.4/cmake-3.4.1-Darwin-x86_64.tar.gz
-            tar xf cmake-3.4.1-Darwin-x86_64.tar.gz
-            export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
-            # Installing LLVM outside of brew
-            curl -O https://releases.llvm.org/8.0.0/clang+llvm-8.0.0-x86_64-apple-darwin.tar.xz
-            tar xf clang+llvm-8.0.0-x86_64-apple-darwin.tar.xz
-      - run:
-          name: Install Rust
-          command: |
-            curl -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly-2019-06-10
-            export PATH="$HOME/.cargo/bin:$PATH"
-            cargo --version
-      - run:
-          name: Tests
-          command: |
-            export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
-            export PATH="$HOME/.cargo/bin:$PATH"
-            export LLVM_SYS_80_PREFIX="`pwd`/clang+llvm-8.0.0-x86_64-apple-darwin/"
-            # We increase the ulimit for fixing cargo unclosed files in mac
-            ulimit -n 8000
-            sudo sysctl -w kern.maxfiles=655360 kern.maxfilesperproc=327680
-
-            make test
-      - run:
-          name: Release Build
-          command: |
-            export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
-            export PATH="$HOME/.cargo/bin:$PATH"
-            export LLVM_SYS_80_PREFIX="`pwd`/clang+llvm-8.0.0-x86_64-apple-darwin/"
-            make release
-            cargo build --release --manifest-path wapm-cli/Cargo.toml --features "telemetry update-notifications"
-            mkdir -p artifacts
-            make build-install
-            cp ./wasmer.tar.gz ./artifacts/$(./scripts/binary-name.sh)
-            # VERSION=$(cargo pkgid | cut -d# -f2 | cut -d: -f2)
-            # echo "${VERSION}" >> artifacts/version
-      - run:
-          name: Generate dynamic library for the runtime C API
-          command: |
-            export PATH="$HOME/.cargo/bin:$PATH"
-            cargo build --release --manifest-path lib/runtime-c-api/Cargo.toml
-            install_name_tool -id "@rpath/libwasmer_runtime_c_api.dylib" target/release/libwasmer_runtime_c_api.dylib
-            cp target/release/libwasmer_runtime_c_api.dylib ./artifacts
-      - persist_to_workspace:
-          root: .
-          paths:
-            - artifacts
-      - save_cache:
-          paths:
-            - ~/.cargo/registry/
-            - target/release/.fingerprint
-            - target/release/build
-            - target/release/deps
-            - wapm-cli/target/release/.fingerprint
-            - wapm-cli/target/release/build
-            - wapm-cli/target/release/deps
-          key: v8-cargo-cache-darwin-nightly-{{ arch }}-{{ checksum "Cargo.lock" }}
-
-  publish-github-release:
-    docker:
-      - image: cibuilds/github
-    steps:
-      - attach_workspace:
-          at: .
-      - run:
-          name: "Publish Release on GitHub"
-          command: |
-            # go get github.com/tcnksm/ghr
-            # VERSION=$(git log -1 --pretty=%B)
-            # VERSION=$(./artifacts/ --version)
-            VERSION=$(cat ./artifacts/version)
-            # VERSION_TAG=${CIRCLE_TAG}
-            VERSION_TAG=$(cat ./artifacts/git_version)
-            LATEST_VERSION_PUBLISHED_ON_CRATES=$(curl -s https://raw.githubusercontent.com/rust-lang/crates.io-index/master/wa/sm/wasmer-runtime | tail -n 1 | sed 's/.*"vers":"\([^"]*\)".*/\1/')
-            if ( [ $VERSION_TAG -ne $LATEST_VERSION_PUBLISHED_ON_CRATES ] ) then { echo "Could not detect version published to crates.io; make sure we've published the crates before publishing the Wasmer binary"; exit 1; } else { true; } fi
-            rm ./artifacts/version
-            rm ./artifacts/git_version
-            # VERSION_TAG=$(git describe --exact-match --tags)
-            #if [ "$VERSION" == "$VERSION_TAG" ]; then
-            # echo "Versions match, publishing to Github"
-            ghr -t ${GITHUB_TOKEN} -u ${CIRCLE_PROJECT_USERNAME} -r ${CIRCLE_PROJECT_REPONAME} -c ${CIRCLE_SHA1} ${VERSION} ./artifacts/  || true
-            #else
-            #    echo "Versions don't match. Wasmer output version (wasmer --version) is ${VERSION} while Git tag is ${VERSION_TAG}"
-            #    exit 1
-            #fi
-  trigger-benchmark-build:
-    docker:
-      - image: circleci/rust:latest
-    steps:
-      - run:
-          name: "Trigger Benchmark Build"
-          command: |
-            if [[ -z "${CIRCLE_API_USER_TOKEN}" ]]; then
-               echo "CIRCLE_API_USER_TOKEN environment variable not set"
-               exit 1
-            else
-               echo "Triggering benchmark build"
-               curl -u ${CIRCLE_API_USER_TOKEN} \
-                    -d build_parameters[CIRCLE_JOB]=bench \
-                    https://circleci.com/api/v1.1/project/github/wasmerio/wasmer-bench/tree/master
-            fi
-workflows:
-  version: 2
-  main:
-    jobs:
-      - changelog
-      - lint
-      - test:
-          filters:
-            branches:
-              only:
-                - trying
-                - staging
-      - test-rust-example:
-          filters:
-            branches:
-              only:
-                - trying
-                - staging
-      - test-macos:
-          filters:
-            branches:
-              only:
-                - trying
-                - staging
-      - test-and-build:
-          filters:
-            branches:
-              only:
-                - master
-      - test-and-build-macos:
-          filters:
-            branches:
-              only:
-                - master
-      - test-stable:
-          filters:
-            branches:
-              only:
-                - trying
-                - staging
-      - publish-github-release:
-          requires:
-            - lint
-            - test-and-build
-            - test-and-build-macos
-          filters:
-            branches:
-              only: master
-      - trigger-benchmark-build:
-          requires:
-            - test-and-build
-            - lint
-          filters:
-            branches:
-              only: master