-- Remove ext-modules from pyproject.toml as it is not supported by setuptools < 64.
-- The extension modules are now defined in setup.py.

--- pyproject.toml.orig	2026-02-23 23:57:10 UTC
+++ pyproject.toml
@@ -13,8 +13,6 @@ readme = "README.md"
 ]
 description = "Utilities for processing high-throughput sequencing experiments"
 readme = "README.md"
-license = "GPL-3.0-or-later"
-license-files = ["LICENSE"]
 dynamic = ["version"]
 requires-python = ">= 3.12"
 dependencies = [
@@ -45,12 +43,6 @@ packages = [
     'hits.serialize',
     'hits.visualize',
     'hits.visualize.interactive',
-]
-
-ext-modules = [
-    {name = "hits.adapters_cython", sources = ["hits/adapters_cython.pyx"]},
-    {name = "hits.fastq_cython", sources = ["hits/fastq_cython.pyx"]},
-    {name = "hits.sw_cython", sources = ["hits/sw_cython.pyx"]},
 ]
 
 [tool.setuptools.dynamic]