diff --git a/.github/workflows/build+test.yml b/.github/workflows/build+test.yml
new file mode 100644
index 0000000..5111096
--- /dev/null
+++ b/.github/workflows/build+test.yml
@@ -0,0 +1,30 @@
+name: Build and test ccronexpr
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - test
+      - '[0-9]+.[0-9]+.[0-9]'
+  pull_request:
+    types: [opened, synchronize, labeled, reopened]
+  workflow_dispatch:
+
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref_type == 'tag' && ( (github.ref_name == '0.0.0-test' && 'test') || 'master') || github.ref_name }}"
+  cancel-in-progress: ${{ github.ref_type == 'tag' || github.ref_name != 'master' }}
+
+jobs:
+  build_test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Make build dir
+        run: mkdir -p "${{ github.workspace }}/build"
+      - name: Build with CMAKE
+        run: |
+          cmake -B "${{ github.workspace }}/build" -S ${{ github.workspace }}
+          cmake --build "${{ github.workspace }}/build" --target ccronexpr
+      - name: Run test executable
+        run: "${{ github.workspace }}/build/ccronexpr"
diff --git a/.gitignore b/.gitignore
index 95428ef..7e62b63 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,6 @@
 /nbproject
 /Makefile
 /cmake-build-debug/
-/CMakeLists.txt
 /.idea/
 a.out
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..b747b5f
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.28)
+project(ccronexpr C)
+
+set(CMAKE_C_STANDARD 11)
+
+include_directories(.)
+
+add_executable(ccronexpr
+        ccronexpr.c
+        ccronexpr.h
+        ccronexpr_test.c)