diff --git a/.github/ci.sh b/.github/ci.sh
new file mode 100644
index 0000000000..daba792673
--- /dev/null
+++ b/.github/ci.sh
@@ -0,0 +1,157 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+[[ "$RUNNER_OS" == 'Windows' ]] && IS_WIN=true || IS_WIN=false
+BIN=bin
+EXT=""
+$IS_WIN && EXT=".exe"
+mkdir -p "$BIN"
+
+is_exe() { [[ -x "$1/$2$EXT" ]] || command -v "$2" > /dev/null 2>&1; }
+
+extract_exe() {
+  exe="$(cabal v2-exec which "$1$EXT")"
+  name="$(basename "$exe")"
+  echo "Copying $name to $2"
+  mkdir -p "$2"
+  cp -f "$exe" "$2/$name"
+  $IS_WIN || chmod +x "$2/$name"
+}
+
+retry() {
+  echo "Attempting with retry:" "$@"
+  local n=1
+  while true; do
+    if "$@"; then
+      break
+    else
+      if [[ $n -lt 3 ]]; then
+        sleep $n # don't retry immediately
+        ((n++))
+        echo "Command failed. Attempt $n/3:"
+      else
+        echo "The command has failed after $n attempts."
+        return 1
+      fi
+    fi
+  done
+}
+
+setup_dist_bins() {
+  is_exe "dist/bin" "saw" && is_exe "dist/bin" "jss" && return
+  extract_exe "saw" "dist/bin"
+  extract_exe "jss" "dist/bin"
+  strip dist/bin/saw* || echo "Strip failed: Ignoring harmless error"
+  strip dist/bin/jss* || echo "Strip failed: Ignoring harmless error"
+}
+
+install_z3() {
+  is_exe "$BIN" "z3" && return
+
+  case "$RUNNER_OS" in
+    Linux) file="ubuntu-16.04.zip" ;;
+    macOS) file="osx-10.14.6.zip" ;;
+    Windows) file="win.zip" ;;
+  esac
+  curl -o z3.zip -sL "https://github.com/Z3Prover/z3/releases/download/z3-$Z3_VERSION/z3-$Z3_VERSION-x64-$file"
+
+  if $IS_WIN; then 7z x -bd z3.zip; else unzip z3.zip; fi
+  cp z3-*/bin/z3$EXT $BIN/z3$EXT
+  $IS_WIN || chmod +x $BIN/z3
+  rm z3.zip
+}
+
+install_cvc4() {
+  is_exe "$BIN" "cvc4" && return
+  version="${CVC4_VERSION#4.}" # 4.y.z -> y.z
+
+  case "$RUNNER_OS" in
+    Linux) file="x86_64-linux-opt" ;;
+    Windows) file="win64-opt.exe" ;;
+    macOS) file="macos-opt" ;;
+  esac
+  curl -o cvc4$EXT -sL "https://github.com/CVC4/CVC4/releases/download/$version/cvc4-$version-$file"
+  $IS_WIN || chmod +x cvc4$EXT
+  mv cvc4$EXT "$BIN/cvc4$EXT"
+}
+
+install_yices() {
+  is_exe "$BIN" "yices" && return
+  ext=".tar.gz"
+  case "$RUNNER_OS" in
+    Linux) file="pc-linux-gnu-static-gmp.tar.gz" ;;
+    macOS) file="apple-darwin18.7.0-static-gmp.tar.gz" ;;
+    Windows) file="pc-mingw32-static-gmp.zip" && ext=".zip" ;;
+  esac
+  curl -o "yices$ext" -sL "https://yices.csl.sri.com/releases/$YICES_VERSION/yices-$YICES_VERSION-x86_64-$file"
+
+  if $IS_WIN; then
+    7z x -bd "yices$ext"
+    mv "yices-$YICES_VERSION"/bin/*.exe "$BIN"
+  else
+    tar -xzf "yices$ext"
+    pushd "yices-$YICES_VERSION" || exit
+    sudo ./install-yices
+    popd || exit
+  fi
+  rm -rf "yices$ext" "yices-$YICES_VERSION"
+}
+
+install_yasm() {
+  is_exe "$BIN" "yasm" && return
+  if [[ "$RUNNER_OS" = "Linux" ]]; then
+    apt-get install -y yasm
+  else
+    brew install yasm
+  fi
+}
+
+build() {
+  ghc_ver="$(ghc --numeric-version)"
+  cp cabal.GHC-"$ghc_ver".config cabal.project.freeze
+  cabal v2-update
+  # Limit jobs on windows due to: https://gitlab.haskell.org/ghc/ghc/issues/17926
+  if [[ "$ghc_ver" =~ 8.8.3|8.10.1 && $IS_WIN ]]; then JOBS=1; else JOBS=2; fi
+  cabal v2-configure -j$JOBS --minimize-conflict-set
+  tee -a cabal.project cabal.project.ci > /dev/null
+  retry cabal v2-build "$@" saw jss
+}
+
+build_abc() {
+  arch=X86_64
+  case "$RUNNER_OS" in
+    Linux) os="Linux" ;;
+    macOS) os="OSX" ;;
+    Windows) return ;;
+  esac
+  pushd deps/abcBridge
+  $IS_WIN || scripts/build-abc.sh $arch $os
+  popd
+}
+
+install_system_deps() {
+  install_z3 &
+  install_cvc4 &
+  install_yices &
+  install_yasm &
+  wait
+  export PATH=$PWD/$BIN:$PATH
+  echo "::add-path::$PWD/$BIN"
+  is_exe "$BIN" z3 && is_exe "$BIN" cvc4 && is_exe "$BIN" yices && is_exe "$BIN" yasm
+}
+
+test_dist() {
+  # To be replaced with a working implementation
+  # Copied from legacy CI
+  setup_dist_bins
+  pushd intTests
+  for t in test0001 test0019_jss_switch_statement test_crucible_jvm test_ecdsa test_examples test_issue108 test_tutorial1 test_tutorial2 test_tutorial_w4; do echo $t >> disabled_tests.txt; done
+  # RT_JAR=/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/rt.jar LOUD=true ./runtests.sh
+  LOUD=true ./runtests.sh
+  sh -c "! grep '<failure>' results.xml"
+}
+
+COMMAND="$1"
+shift
+
+"$COMMAND" "$@"
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000000..57becbfdb1
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,59 @@
+name: SAWScript
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        ghc: ["8.6.5", "8.8.3"]
+    name: SAWScript - GHC v${{ matrix.ghc }} - ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - run: |
+          git submodule update --init
+          git -C deps/abcBridge submodule update --init
+
+      - uses: actions/setup-haskell@v1
+        id: setup-haskell
+        with:
+          ghc-version: ${{ matrix.ghc }}
+
+      - uses: actions/cache@v2
+        name: Cache cabal store
+        with:
+          path: |
+            ${{ steps.setup-haskell.outputs.cabal-store }}
+            dist-newstyle
+          key: store-${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('**/cabal.GHC-*') }}-${{ github.sha }}
+          restore-keys: |
+            store-${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('**/cabal.GHC-*') }}-
+            store-${{ runner.os }}-${{ matrix.ghc }}-
+            store-${{ runner.os }}-
+
+      - shell: bash
+        run: .github/ci.sh build_abc
+
+      - shell: bash
+        run: .github/ci.sh build
+
+      - shell: bash
+        run: .github/ci.sh install_system_deps
+        env:
+          Z3_VERSION: "4.8.7"
+          CVC4_VERSION: "4.1.8"
+          YICES_VERSION: "2.6.2"
+
+      - uses: actions/setup-java@v1
+        with:
+          java-version: "8"
+          java-package: jdk
+          architecture: x64
+
+      - shell: bash
+        run: .github/ci.sh test_dist