diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
new file mode 100644
index 00000000..dfa96dd0
--- /dev/null
+++ b/.github/workflows/rust.yml
@@ -0,0 +1,29 @@
+name: Rust
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  merge_group:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build-nightly:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Check fmt
+        run: cargo fmt -- --check
+      - name: Build
+        run: ./ci.sh
diff --git a/ci.sh b/ci.sh
new file mode 100644
index 00000000..74610ff2
--- /dev/null
+++ b/ci.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+export DEFMT_LOG=trace
+
+# build examples
+#==================
+
+(cd examples; cargo build --bin multisocket --release)
+(cd examples; cargo build --bin tcp-client --release)
+(cd examples; cargo build --bin tcp-server --release)
+(cd examples; cargo build --bin tcp-udp --release)
+
+# build lib
+#============
+
+cargo build --target thumbv6m-none-eabi