If python had a package management, I would hate it.

pygomx-module/setup.py

@@ -1,3 +1,33 @@
-from setuptools import setup
+import subprocess
+from contextlib import suppress
+from setuptools import Command, setup
+from setuptools.command.build import build
 
-setup(name="pygomx-module", version="0.0.1", py_modules=["_pygomx"])
+
+class CustomCommand(Command):
+    def initialize_options(self) -> None:
+        pass
+
+    def finalize_options(self) -> None:
+        pass
+
+    def run(self) -> None:
+        go_call = [
+            "go",
+            "build",
+            "-buildmode=c-archive",
+            "-o",
+            "../pygomx-module/libmxclient.a",
+            ".",
+        ]
+        subprocess.call(go_call, cwd="../libmxclient")
+
+
+class CustomBuild(build):
+    sub_commands = [("build_custom", None)] + build.sub_commands
+
+
+setup(
+    cffi_modules=["build_ffi.py:ffibuilder"],
+    cmdclass={"build": CustomBuild, "build_custom": CustomCommand},
+)