python3Packages.psycopg: 3.1 -> 3.1.1

https://www.psycopg.org/psycopg3/docs/news.html#psycopg-3-1-1

pkgs/development/python-modules/psycopg/ctypes.patch

···
+diff --git a/psycopg/psycopg/pq/_pq_ctypes.py b/psycopg/psycopg/pq/_pq_ctypes.py
+index 4f9d00fb..24b90ef6 100644
+--- a/psycopg/psycopg/pq/_pq_ctypes.py
++++ b/psycopg/psycopg/pq/_pq_ctypes.py
+@@ -11,14 +11,10 @@ from ctypes import Structure, CFUNCTYPE, POINTER
+ from ctypes import c_char, c_char_p, c_int, c_size_t, c_ubyte, c_uint, c_void_p
+ from typing import List, Optional, Tuple
+ 
+-from .misc import find_libpq_full_path
+ from ..errors import NotSupportedError
+ 
+-libname = find_libpq_full_path()
+-if not libname:
+-    raise ImportError("libpq library not found")
+ 
+-pq = ctypes.cdll.LoadLibrary(libname)
++pq = ctypes.cdll.LoadLibrary("@libpq@")
+ 
+ 
+ class FILE(Structure):
+@@ -28,9 +24,7 @@ class FILE(Structure):
+ FILE_ptr = POINTER(FILE)
+ 
+ if sys.platform == "linux":
+-    libcname = ctypes.util.find_library("c")
+-    assert libcname
+-    libc = ctypes.cdll.LoadLibrary(libcname)
++    libc = ctypes.cdll.LoadLibrary("@libc@")
+ 
+     fdopen = libc.fdopen
+     fdopen.argtypes = (c_int, c_char_p)
+diff --git a/tests/fix_pq.py b/tests/fix_pq.py
+index 6811a26c..c1829c82 100644
+--- a/tests/fix_pq.py
++++ b/tests/fix_pq.py
+@@ -51,9 +51,7 @@ def libpq():
+         from psycopg.pq.misc import find_libpq_full_path
+ 
+         # Not available when testing the binary package
+-        libname = find_libpq_full_path()
+-        assert libname, "libpq libname not found"
+-        return ctypes.pydll.LoadLibrary(libname)
++        return ctypes.pydll.LoadLibrary("@libpq@")
+     except Exception as e:
+         if pq.__impl__ == "binary":
+             pytest.skip(f"can't load libpq for testing: {e}")

pkgs/development/python-modules/psycopg/default.nix

···
 
 let
   pname = "psycopg";
-  version = "3.1";
+  version = "3.1.1";
 
   src = fetchFromGitHub {
     owner = "psycopg";
     repo = pname;
     rev = "refs/tags/${version}";
-    hash = "sha256-N0Qc8pSWN2NFZn06lYZ7DKMbk6H8aIByS+wDnOQ/O+Y=";
+    hash = "sha256-PrWHjs8PLmx7bgKtyhXaiSKmz9oT2OhXDkKd4xi7e0A=";
   };
 
   patches = [
     (substituteAll {
-      src = ./libpq.patch;
+      src = ./ctypes.patch;
       libpq = "${postgresql.lib}/lib/libpq${stdenv.hostPlatform.extensions.sharedLibrary}";
+      libc = "${stdenv.cc.libc}/lib/libc.so.6";
     })
   ];
 

pkgs/development/python-modules/psycopg/libpq.patch

···
-diff --git a/psycopg/psycopg/pq/_pq_ctypes.py b/psycopg/psycopg/pq/_pq_ctypes.py
-index bf04d560..9e79fc3f 100644
---- a/psycopg/psycopg/pq/_pq_ctypes.py
-+++ b/psycopg/psycopg/pq/_pq_ctypes.py
-@@ -13,16 +13,7 @@ from typing import List, Optional, Tuple
- 
- from ..errors import NotSupportedError
- 
--if sys.platform == "win32":
--    libname = ctypes.util.find_library("libpq.dll")
--elif sys.platform == "darwin":
--    libname = ctypes.util.find_library("libpq.dylib")
--else:
--    libname = ctypes.util.find_library("pq")
--if not libname:
--    raise ImportError("libpq library not found")
--
--pq = ctypes.cdll.LoadLibrary(libname)
-+pq = ctypes.cdll.LoadLibrary("@libpq@")
- 
- # Get the libpq version to define what functions are available.
-