From 04c39df3258e848613f95e06775ec46e2665fe13 Mon Sep 17 00:00:00 2001
From: Yueh-Shun Li <shamrocklee@posteo.net>
Date: Sat, 1 Feb 2025 23:40:28 +0800
Subject: [PATCH] buildPython*: abstract out transformDrv

---
 .../interpreters/python/mk-python-derivation.nix  | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index 11bb1af773ee..39263a887639 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -271,7 +271,7 @@ let
   isSetuptoolsDependency = isSetuptoolsDependency' (attrs.pname or null);
 
   # Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
-  self = toPythonModule (
+  self = (
     stdenv.mkDerivation (
       finalAttrs:
       (cleanAttrs attrs)
@@ -451,7 +451,14 @@ let
     )
   );
 
+  # This derivation transformation function must be independent to `attrs`
+  # for fixed-point arguments support in the future.
+  transformDrv =
+    drv:
+    extendDerivation (
+      drv.disabled
+      -> throw "${lib.removePrefix namePrefix drv.name} not supported for interpreter ${python.executable}"
+    ) { } (toPythonModule drv);
+
 in
-extendDerivation (
-  disabled -> throw "${name} not supported for interpreter ${python.executable}"
-) { } self
+transformDrv self