From ce3dc05a4c188e457721d8972b364e11ab71a64e Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Mon, 11 May 2026 20:35:44 -0400
Subject: [PATCH 1/4] buildPythonPackage: save a function call

---
 pkgs/development/interpreters/python/mk-python-derivation.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index 5f4ac7b84645..6746e4b1ec63 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -271,7 +271,7 @@ lib.extendMkDerivation {
             if (isPythonModule drv) && (isMismatchedPython drv) then throwMismatch attrName drv else drv;
 
         in
-        attrName: inputs: map (checkDrv attrName) inputs;
+        attrName: map (checkDrv attrName);
 
       isBootstrapInstallPackage = isBootstrapInstallPackage' (finalAttrs.pname or null);
 

From b57eb40ea7694d823e3e12b0791090ac0e4256ca Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Mon, 11 May 2026 20:37:46 -0400
Subject: [PATCH 2/4] buildPythonPackage: avoid validating python itself

---
 .../interpreters/python/mk-python-derivation.nix       | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index 6746e4b1ec63..7155137b1f2f 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -373,16 +373,16 @@ lib.extendMkDerivation {
 
       buildInputs = validatePythonMatches "buildInputs" (buildInputs ++ pythonPath);
 
-      propagatedBuildInputs = validatePythonMatches "propagatedBuildInputs" (
-        propagatedBuildInputs
-        ++ getFinalPassthru "dependencies"
+      propagatedBuildInputs =
+        validatePythonMatches "propagatedBuildInputs" (
+          propagatedBuildInputs ++ getFinalPassthru "dependencies"
+        )
         ++ [
           # we propagate python even for packages transformed with 'toPythonApplication'
           # this pollutes the PATH but avoids rebuilds
           # see https://github.com/NixOS/nixpkgs/issues/170887 for more context
           python
-        ]
-      );
+        ];
 
       inherit strictDeps;
 

From 0f027769b28494e49dc08e47a1707b45889038a0 Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Mon, 11 May 2026 20:41:53 -0400
Subject: [PATCH 3/4] buildPythonPackage: use nullable attr keys instead

---
 .../python/mk-python-derivation.nix             | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index 7155137b1f2f..6dd3651bfa30 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -40,7 +40,6 @@ let
     flip
     getName
     hasSuffix
-    head
     isBool
     max
     optional
@@ -48,13 +47,9 @@ let
     optionals
     optionalString
     removePrefix
-    splitString
     stringLength
     ;
 
-  getOptionalAttrs =
-    names: attrs: lib.getAttrs (lib.intersectLists names (lib.attrNames attrs)) attrs;
-
   leftPadName =
     name: against:
     let
@@ -463,13 +458,11 @@ lib.extendMkDerivation {
             attrs.${name} == [ ]
           ) "${lib.getName finalAttrs}: ${name} must be unspecified, null or a non-empty list." attrs.${name}
         )
-        (
-          getOptionalAttrs [
-            "enabledTestMarks"
-            "enabledTestPaths"
-            "enabledTests"
-          ] attrs
-        );
+        {
+          ${if attrs ? enabledTestMarks then "enabledTestMarks" else null} = attrs.enabledTestMarks;
+          ${if attrs ? enabledTestPaths then "enabledTestPaths" else null} = attrs.enabledTestPaths;
+          ${if attrs ? enabledTests then "enabledTests" else null} = attrs.enabledTests;
+        };
 
   # This derivation transformation function must be independent to `attrs`
   # for fixed-point arguments support in the future.

From bc3ca125ebebc7ba622faede612b676cca4d3907 Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Mon, 11 May 2026 20:47:17 -0400
Subject: [PATCH 4/4] python/wrapper: use the python that's already added

requiredPythonModules always adds a python element.
---
 pkgs/development/interpreters/python/wrapper.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/python/wrapper.nix b/pkgs/development/interpreters/python/wrapper.nix
index 914e4b354c49..2f901232c1ec 100644
--- a/pkgs/development/interpreters/python/wrapper.nix
+++ b/pkgs/development/interpreters/python/wrapper.nix
@@ -23,7 +23,7 @@
 let
   env =
     let
-      paths = requiredPythonModules (extraLibs ++ [ python ]) ++ [
+      paths = requiredPythonModules extraLibs ++ [
         (runCommand "bin" { } ''
           mkdir -p $out/bin
         '')