core: added patches to support latest problems with setuptools scm.

pkgs/patches/configparser/pyproject.patch

@@ -0,0 +1,10 b''
+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]

pkgs/patches/importlib_metadata/pyproject.patch

@@ -0,0 +1,7 b''
+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"]

pkgs/patches/zipp/pyproject.patch

@@ -0,0 +1,10 b''
+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]

pkgs/patches/pytest/setuptools.patch

@@ -6,7 +6,7 b' diff -rup pytest-4.6.5-orig/setup.py pyt'
      setup(
          use_scm_version={"write_to": "src/_pytest/_version.py"},
 -        setup_requires=["setuptools-scm", "setuptools>=40.0"],
-+        setup_requires=["setuptools-scm", "setuptools<=42.0"],
++        setup_requires=["setuptools-scm<6.0.0", "setuptools<=42.0"],
          package_dir={"": "src"},
          # fmt: off
          extras_require={
  No newline at end of file

pkgs/python-packages-overrides.nix

@@ -280,6 +280,54 b' self: super: {'
     ];
   });
 
+  "pytest-runner" = super."pytest-runner".override (attrs: {
+    propagatedBuildInputs = [
+      self."setuptools-scm"
+    ];
+  });
+
+  "py" = super."py".override (attrs: {
+    propagatedBuildInputs = [
+      self."setuptools-scm"
+    ];
+  });
+
+  "python-dateutil" = super."python-dateutil".override (attrs: {
+    propagatedBuildInputs = attrs.propagatedBuildInputs ++ [
+      self."setuptools-scm"
+    ];
+  });
+
+  "configparser" = super."configparser".override (attrs: {
+    patches = [
+      ./patches/configparser/pyproject.patch
+    ];
+    propagatedBuildInputs = [
+      self."setuptools-scm"
+    ];
+  });
+
+  "importlib-metadata" = super."importlib-metadata".override (attrs: {
+
+    patches = [
+      ./patches/importlib_metadata/pyproject.patch
+    ];
+
+    propagatedBuildInputs = attrs.propagatedBuildInputs ++ [
+      self."setuptools-scm"
+    ];
+
+  });
+
+  "zipp" = super."zipp".override (attrs: {
+    patches = [
+      ./patches/zipp/pyproject.patch
+    ];
+    propagatedBuildInputs = attrs.propagatedBuildInputs ++ [
+      self."setuptools-scm"
+    ];
+  });
+
   "pyramid-apispec" = super."pyramid-apispec".override (attrs: {
     patches = [
       ./patches/pyramid_apispec/setuptools.patch

pkgs/python-packages.nix

@@ -2092,6 +2092,17 b' self: super: {'
       license = [ pkgs.lib.licenses.mit ];
     };
   };
+  "setuptools-scm" = super.buildPythonPackage {
+    name = "setuptools-scm-3.5.0";
+    doCheck = false;
+    src = fetchurl {
+      url = "https://files.pythonhosted.org/packages/b2/f7/60a645aae001a2e06cf4b8db2fba9d9f36b8fd378f10647e3e218b61b74b/setuptools_scm-3.5.0.tar.gz";
+      sha256 = "5bdf21a05792903cafe7ae0c9501182ab52497614fa6b1750d9dbae7b60c1a87";
+    };
+    meta = {
+      license = [ pkgs.lib.licenses.psfl ];
+    };
+  };
   "simplegeneric" = super.buildPythonPackage {
     name = "simplegeneric-0.8.1";
     doCheck = false;