buildPython*: make attributes overridable via overrideAttrs (non-stag…

…ing)

Make src, removePythonDeps and relaxPythonDeps overridable
via overrideAttrs for Python packages.

Make pyproject overridable via overrideAttrs as passthru.pyproject.

pkgs/development/interpreters/python/mk-python-derivation.nix

@@ -211,9 +211,9 @@ let
     finalAttrs:
     let
       format' =
-        assert (pyproject != null) -> (format == null);
-        if pyproject != null then
-          if pyproject then "pyproject" else "other"
+        assert (finalAttrs.passthru.pyproject != null) -> (format == null);
+        if finalAttrs.passthru.pyproject != null then
+          if finalAttrs.passthru.pyproject then "pyproject" else "other"
         else if format != null then
           format
         else
@@ -268,11 +268,11 @@ let
         in
         attrName: inputs: map (checkDrv attrName) inputs;
 
-      isBootstrapInstallPackage = isBootstrapInstallPackage' (attrs.pname or null);
+      isBootstrapInstallPackage = isBootstrapInstallPackage' (finalAttrs.pname or null);
 
-      isBootstrapPackage = isBootstrapInstallPackage || isBootstrapPackage' (attrs.pname or null);
+      isBootstrapPackage = isBootstrapInstallPackage || isBootstrapPackage' (finalAttrs.pname or null);
 
-      isSetuptoolsDependency = isSetuptoolsDependency' (attrs.pname or null);
+      isSetuptoolsDependency = isSetuptoolsDependency' (finalAttrs.pname or null);
 
     in
     (cleanAttrs attrs)
@@ -298,13 +298,15 @@ let
           #
           pythonCatchConflictsHook
         ]
-        ++ optionals (attrs ? pythonRelaxDeps || attrs ? pythonRemoveDeps) [
-          pythonRelaxDepsHook
-        ]
+        ++
+          optionals (finalAttrs.pythonRelaxDeps or [ ] != [ ] || finalAttrs.pythonRemoveDeps or [ ] != [ ])
+            [
+              pythonRelaxDepsHook
+            ]
         ++ optionals removeBinBytecode [
           pythonRemoveBinBytecodeHook
         ]
-        ++ optionals (hasSuffix "zip" (attrs.src.name or "")) [
+        ++ optionals (hasSuffix "zip" (finalAttrs.src.name or "")) [
           unzip
         ]
         ++ optionals (format' == "setuptools") [
@@ -399,7 +401,10 @@ let
 
       passthru =
         {
-          inherit disabled;
+          inherit
+            disabled
+            pyproject
+            ;
         }
         // {
           updateScript =