From 862aa989eca9b4517f6a769b27c70a1975109f4e Mon Sep 17 00:00:00 2001
From: Gaetan Lepage <gaetan@glepage.com>
Date: Fri, 26 Dec 2025 18:18:03 +0000
Subject: [PATCH] python3Packages.pymc: 5.26.1 -> 5.27.0

Diff: https://github.com/pymc-devs/pymc/compare/v5.26.1...v5.27.0

Changelog: https://github.com/pymc-devs/pymc/releases/tag/v5.27.0
---
 pkgs/development/python-modules/pymc/default.nix | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/python-modules/pymc/default.nix b/pkgs/development/python-modules/pymc/default.nix
index a017f9320c59..feb82d14628f 100644
--- a/pkgs/development/python-modules/pymc/default.nix
+++ b/pkgs/development/python-modules/pymc/default.nix
@@ -18,18 +18,20 @@
   scipy,
   threadpoolctl,
   typing-extensions,
+
+  writableTmpDirAsHomeHook,
 }:
 
 buildPythonPackage rec {
   pname = "pymc";
-  version = "5.26.1";
+  version = "5.27.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "pymc-devs";
     repo = "pymc";
     tag = "v${version}";
-    hash = "sha256-j1v8MzAFfOmkN7pDcF91dS5Xprls8qfTQHWdaFUO4GU=";
+    hash = "sha256-wBeWydrHrF+wNZnqWa2k8tCaUvjcoiSrmY85LUhrQds=";
   };
 
   build-system = [
@@ -50,6 +52,13 @@ buildPythonPackage rec {
     typing-extensions
   ];
 
+  nativeBuildInputs = [
+    # Arviz (imported by pymc) wants to write a stamp file to the homedir at import time.
+    # Without $HOME being writable, `pythonImportsCheck` fails.
+    # https://github.com/arviz-devs/arviz/commit/4db612908f588d89bb5bfb6b83a08ada3d54fd02
+    writableTmpDirAsHomeHook
+  ];
+
   # The test suite is computationally intensive and test failures are not
   # indicative for package usability hence tests are disabled by default.
   doCheck = false;