--- a
+++ b/setup.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+from distutils.sysconfig import get_python_inc
+
+import numpy
+from setuptools import Extension, setup
+
+# See if Cython is installed
+try:
+    from Cython.Build import cythonize
+    from Cython.Distutils import build_ext
+except ImportError:
+    # Do nothing if Cython is not available
+    # Got to provide this function. Otherwise, poetry will fail
+    print("You must install Cython to build this library")
+else:
+    # Cython is installed. Compile
+    print("Compiling")
+
+    COMPILER_DIRECTIVES = {
+        "language_level": "3",
+    }
+    MOD_NAMES = [
+        "edsnlp.matchers.phrase",
+        "edsnlp.pipes.core.sentences.fast_sentences",
+    ]
+
+    include_dirs = [
+        numpy.get_include(),
+        get_python_inc(plat_specific=True),
+    ]
+    ext_modules = []
+    for name in MOD_NAMES:
+        mod_path = name.replace(".", "/") + ".pyx"
+        ext = Extension(
+            name,
+            [mod_path],
+            language="c++",
+            include_dirs=include_dirs,
+            extra_compile_args=["-std=c++11"],
+        )
+        ext_modules.append(ext)
+    print("Cythonizing sources")
+    ext_modules = cythonize(ext_modules, compiler_directives=COMPILER_DIRECTIVES)
+
+    setup(
+        ext_modules=ext_modules,
+        package_data={
+            "": ["*.dylib", "*.so"],
+        },
+        cmdclass={"build_ext": build_ext},
+    )