diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..8abf8e8
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,21 @@
+on: [push, pull_request]
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+
+  test:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9]
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - run: sudo apt-get install -y --no-install-recommends libmlpack-dev
+      - run: pip install .
diff --git a/README.md b/README.md
index a6d4f0c..6cb7c2e 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,5 @@ MALA
 ====
 
 Training and evaluation scripts for MALA (https://arxiv.org/abs/1709.02974).
+
+Depends on mlpack (`mlpack` on AUR, `libmlpack-dev` on debian-based).
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..848e39b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools", "cython", "numpy", "wheel"]
+build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
index 0f57144..452fd06 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,4 @@
+numpy
+cython
+setuptools
 tensorflow
diff --git a/setup.py b/setup.py
index 6370501..c14677d 100644
--- a/setup.py
+++ b/setup.py
@@ -2,6 +2,7 @@
 from setuptools import setup, Extension
 from setuptools.command.build_ext import build_ext as _build_ext
 import os
+import builtins
 
 include_dirs = [
     os.path.join(os.path.dirname(os.path.abspath(__file__)), "mala"),
@@ -18,7 +19,7 @@ class build_ext(_build_ext):
     def finalize_options(self):
         _build_ext.finalize_options(self)
         # Prevent numpy from thinking it is still in its setup process:
-        __builtins__.__NUMPY_SETUP__ = False
+        builtins.__NUMPY_SETUP__ = False
         import numpy
         self.include_dirs.append(numpy.get_include())