diff --git a/pkgs/patches/configparser/pyproject.patch b/pkgs/patches/configparser/pyproject.patch
deleted file mode 100644
--- a/pkgs/patches/configparser/pyproject.patch
+++ /dev/null
@@ -1,10 +0,0 @@
-diff -rup configparser-4.0.2-orig/pyproject.toml configparser-4.0.2/pyproject.toml
---- configparser-4.0.2-orig/pyproject.toml 2021-03-22 21:28:11.000000000 +0100
-+++ configparser-4.0.2/pyproject.toml 2021-03-22 21:28:11.000000000 +0100
-@@ -1,5 +1,5 @@
- [build-system]
--requires = ["setuptools>=40.7", "wheel", "setuptools_scm>=1.15"]
-+requires = ["setuptools<=42.0", "wheel", "setuptools_scm<6.0.0"]
- build-backend = "setuptools.build_meta"
-
- [tool.black]
diff --git a/pkgs/patches/importlib_metadata/pyproject.patch b/pkgs/patches/importlib_metadata/pyproject.patch
deleted file mode 100644
--- a/pkgs/patches/importlib_metadata/pyproject.patch
+++ /dev/null
@@ -1,7 +0,0 @@
-diff -rup importlib-metadata-1.6.0-orig/yproject.toml importlib-metadata-1.6.0/pyproject.toml
---- importlib-metadata-1.6.0-orig/yproject.toml	2021-03-22 22:10:33.000000000 +0100
-+++ importlib-metadata-1.6.0/pyproject.toml	2021-03-22 22:11:09.000000000 +0100
-@@ -1,3 +1,3 @@
- [build-system]
--requires = ["setuptools>=30.3", "wheel", "setuptools_scm"]
-+requires = ["setuptools<42.0", "wheel", "setuptools_scm<6.0.0"]
diff --git a/pkgs/patches/pytest/setuptools.patch b/pkgs/patches/pytest/setuptools.patch
deleted file mode 100644
--- a/pkgs/patches/pytest/setuptools.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff -rup pytest-4.6.9-orig/setup.py pytest-4.6.9/setup.py
---- pytest-4.6.9-orig/setup.py	2018-04-10 10:23:04.000000000 +0200
-+++  pytest-4.6.9/setup.py	2018-04-10 10:23:34.000000000 +0200
-@@ -24,7 +24,7 @@ def main():
- def main():
-     setup(
-         use_scm_version={"write_to": "src/_pytest/_version.py"},
--        setup_requires=["setuptools-scm", "setuptools>=40.0"],
-+        setup_requires=["setuptools-scm<6.0.0", "setuptools<=42.0"],
-         package_dir={"": "src"},
-         # fmt: off
-         extras_require={
\ No newline at end of file
diff --git a/pkgs/patches/zipp/pyproject.patch b/pkgs/patches/zipp/pyproject.patch
deleted file mode 100644
--- a/pkgs/patches/zipp/pyproject.patch
+++ /dev/null
@@ -1,10 +0,0 @@
-diff -rup zip-1.2.0-orig/pyproject.toml zip-1.2.0/pyproject.toml
---- zip-1.2.0-orig/pyproject.toml	2021-03-23 10:55:37.000000000 +0100
-+++ zip-1.2.0/pyproject.toml	2021-03-23 10:56:05.000000000 +0100
-@@ -1,5 +1,5 @@
- [build-system]
--requires = ["setuptools>=34.4", "wheel", "setuptools_scm>=1.15"]
-+requires = ["setuptools<42.0", "wheel", "setuptools_scm<6.0.0"]
- build-backend = "setuptools.build_meta"
-
- [tool.black]