[staging-next] python3Packages.mysql-connector: fix build (#493121)

pkgs/development/python-modules/mysql-connector/0001-Revert-Fix-MacOS-wheels-platform-tag.patch

@@ -2,16 +2,16 @@ diff --git a/cpydist/__init__.py b/cpydist/__init__.py
 index 7fdbaf2..3c427da 100644
 --- a/cpydist/__init__.py
 +++ b/cpydist/__init__.py
-@@ -38,7 +38,7 @@ import tempfile
+@@ -37,7 +37,7 @@ import tempfile
  from glob import glob
  from pathlib import Path
- from subprocess import PIPE, Popen, check_call
+ from subprocess import PIPE, Popen
 -from sysconfig import get_config_vars, get_python_version
 +from sysconfig import get_python_version
 
  from setuptools import Command
  from setuptools.command.build_ext import build_ext
-@@ -68,8 +68,6 @@ version_py = os.path.join("lib", "mysql", "connector", "version.py")
+@@ -67,8 +67,6 @@ version_py = os.path.join("lib", "mysql", "connector", "version.py")
  with open(version_py, "rb") as fp:
      exec(compile(fp.read(), version_py, "exec"))
 
@@ -19,4 +19,4 @@ index 7fdbaf2..3c427da 100644
 -    get_config_vars()["MACOSX_DEPLOYMENT_TARGET"] = "11.0"
 
  COMMON_USER_OPTIONS = [
-     (
+     (

pkgs/development/python-modules/mysql-connector/default.nix

@@ -29,6 +29,8 @@ buildPythonPackage rec {
     hash = "sha256-EwdJpiyplck26Tc9SiczxGieJ3GcTGMQva/fDzhzWn4=";
   };
 
+  sourceRoot = "${src.name}/mysql-connector-python";
+
   patches = [
     # mysql-connector overrides MACOSX_DEPLOYMENT_TARGET to 11.
     # This makes the installation with nixpkgs fail. I suspect, that's