diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..198ebb78
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,86 @@
+name: ci
+
+on: [pull_request] # TODO(ry) [push, pull_request]
+
+jobs:
+  build:
+    name: ${{ matrix.kind }} ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    strategy:
+      matrix:
+        os: [macOS-10.14, windows-2019, ubuntu-16.04]
+    steps:
+      - name: Configure git
+        run: git config --global core.symlinks true
+
+      - name: Clone repository
+        uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+          submodules: true
+
+      - name: Install rust
+        uses: hecrj/setup-rust-action@v1
+        with:
+          rust-version: "1.38.0"
+
+      - name: Install python
+        uses: actions/setup-python@v1
+        with:
+          python-version: "2.7.16"
+
+      - name: Environment (common)
+        run: |
+          echo ::set-env name=GH_ACTIONS::1
+          echo ::set-env name=RUSTC_WRAPPER::sccache
+          echo ::set-env name=DENO_BUILD_MODE::release
+
+      - name: Environment (linux)
+        if: startsWith(matrix.os, 'ubuntu')
+        # In order to test the installer scripts in std we need a deno
+        # executable in the path. See
+        # https://github.com/denoland/deno/blob/27cd2c97f18c0392bc04c66b786717b2bc677315/std/installer/mod.ts#L185-L193
+        # TODO(ry) This path modification should rather be done in "cargo test".
+        run: |
+          curl -LO https://github.com/mozilla/sccache/releases/download/0.2.12/sccache-0.2.12-x86_64-unknown-linux-musl.tar.gz
+          tar -xzvf sccache-0.2.12-x86_64-unknown-linux-musl.tar.gz
+          echo ::add-path::`pwd`/sccache-0.2.12-x86_64-unknown-linux-musl/
+          echo ::add-path::`pwd`/third_party/sscache/linux64
+          echo ::add-path::`pwd`/target/release
+
+      - name: Environment (mac)
+        if: startsWith(matrix.os, 'macOS')
+        run: |
+          curl -LO https://github.com/mozilla/sccache/releases/download/0.2.12/sccache-0.2.12-x86_64-apple-darwin.tar.gz
+          tar -xzvf sccache-0.2.12-x86_64-apple-darwin.tar.gz
+          echo ::add-path::`pwd`/sccache-0.2.12-x86_64-apple-darwin/
+
+      - name: Environment (windows)
+        if: startsWith(matrix.os, 'windows')
+        run: |
+          # These appear unnecessary:
+          #choco install curl
+          #choco install archive
+          curl -LO https://github.com/mozilla/sccache/releases/download/0.2.12/sccache-0.2.12-x86_64-pc-windows-msvc.tar.gz
+          tar -zxvf sccache-0.2.12-x86_64-pc-windows-msvc.tar.gz
+          echo ::add-path::$(pwd)\sccache-0.2.12-x86_64-pc-windows-msvc\
+          echo ::add-path::$(pwd)\target\release
+
+      - name: Start sccache
+        env:
+          AWS_ACCESS_KEY_ID: AKIAIVRN52PLDBP55LBQ
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          SCCACHE_BUCKET: deno-sccache
+          SCCACHE_IDLE_TIMEOUT: 0
+        run: sccache --start-server
+
+      - name: Build
+        run: cargo build -vv --release --locked --all-targets
+
+      - name: Test
+        if: matrix.kind == 'test'
+        run: cargo test -vv --release --locked --all-targets
+
+      - name: Clippy
+        run: cargo clippy --all-targets --release --locked -- -D clippy::all
diff --git a/Cargo.lock b/Cargo.lock
index 7cc5df7d..48ee55ae 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -54,8 +54,8 @@ version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "test4"
-version = "0.1.0"
+name = "rusty_v8"
+version = "0.0.1"
 dependencies = [
  "cargo_gn 0.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "which 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 62324b59..164474c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
-name = "test4"
-version = "0.1.0"
+name = "rusty_v8"
+version = "0.0.1"
 authors = ["Bert Belder <bertbelder@gmail.com>"]
 edition = "2018"
 
diff --git a/build.rs b/build.rs
index 541bdfb5..c41d9963 100644
--- a/build.rs
+++ b/build.rs
@@ -48,22 +48,27 @@ fn git_submodule_update() {
   Command::new("git")
     .arg("submodule")
     .arg("update")
+    .arg("--init")
     .status()
     .expect("git submodule update failed");
 }
 
-// ./depot_tools/gclient sync --gclientfile=gclient_config.py
 fn gclient_sync() {
-  if !Path::new("third_party/depot_tools/gclient").is_file() {
-    // Need to run git submodule update.
+  let gclient = Path::new("third_party/depot_tools/gclient.py");
+
+  if !gclient.exists() {
     git_submodule_update();
   }
+  assert!(gclient.exists());
   disable_depot_tools_update();
 
-  println!("cargo:warning=Running gcient sync to download V8. This could take a while.");
-  let mut cmd = Command::new("./depot_tools/gclient");
+  println!("cargo:warning=Running gclient sync to download V8. This could take a while.");
+  let mut cmd = Command::new("python");
+  cmd.arg("depot_tools/gclient.py");
   cmd.arg("sync");
   cmd.arg("--gclientfile=gclient_config.py");
+  cmd.arg("--no-history");
+  cmd.arg("--shallow");
   cmd.current_dir("third_party");
   let status = cmd.status().expect("gclient sync failed");
   assert!(status.success());