--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,8 @@
 include include/olm/*.h
-include Makefile
 include olm_build.py
+include libolm/*
+include libolm/cmake/*
+include libolm/include/olm/*
+recursive-include libolm/lib *
+include libolm/src/*
+recursive-include libolm/tests *
--- a/olm_build.py
+++ b/olm_build.py
@@ -25,14 +25,23 @@
 
 DEVELOP = os.environ.get("DEVELOP")
 
-compile_args = ["-I../include"]
-link_args = ["-L../build"]
+compile_args = ["-Ilibolm/include"]
+link_args = ["-Llibolm/build"]
 
 if DEVELOP and DEVELOP.lower() in ["yes", "true", "1"]:
     link_args.append('-Wl,-rpath=../build')
 
-headers_build = subprocess.Popen("make headers", shell=True)
-headers_build.wait()
+try:
+    subprocess.run(
+        ["cmake", ".", "-Bbuild", "-DBUILD_SHARED_LIBS=NO"],
+        cwd="libolm", check=True,
+    )
+    subprocess.run(
+        ["cmake", "--build", "build"],
+        cwd="libolm", check=True,
+    )
+except FileNotFoundError:
+    subprocess.run(["make", "static"], cwd="libolm", check=True)
 
 ffibuilder.set_source(