buildPython*: fix the disabled functionality for overrideAttrs-

  # This derivation transformation function must be independent to `attrs`

  # for fixed-point arguments support in the future.

  transformDrv =

    let

      # Workaround to make the `lib.extendDerivation`-based disabled functionality

      # respect `<pkg>.overrideAttrs`

      # It doesn't cover `<pkg>.<output>.overrideAttrs`.

      disablePythonPackage =

        drv:

        extendDerivation (

          drv.disabled

          -> throw "${removePrefix namePrefix drv.name} not supported for interpreter ${python.executable}"

    ) { } (toPythonModule drv);

        ) { } drv

        // {

          overrideAttrs = fdrv: disablePythonPackage (drv.overrideAttrs fdrv);

        };

    in

    drv: disablePythonPackage (toPythonModule drv);

in

transformDrv self