default.nix trying to turn doCheck off, either globally or just for jedi

default.nix

with import <nixpkgs> { config = import ./config.nix ; } ;
let
  doCheck = false;
  myPython = pkgs.python;
  myPythonPackages = pkgs.python27Packages.override { python = myPython; };
  #defines inotify
  inotify = myPythonPackages.buildPythonPackage rec {
    name = "inotify";
    version = "0.6-test";

    src = pkgs.fetchurl {
      url = "https://pypi.python.org/packages/55/f3/7f35bf5ea24ecb0cd9c5ec92b6105473f3322eb20c856f816b99e2eb42a1/python-inotify-0.6-test.tar.gz";
      sha256 = "0h6xmf39kag6wzk6fcwf1pc2mzmpv4hmrbh3y7fh1k5ad1gjh8bm";
    };
    meta = with pkgs.stdenv.lib; {
      homepage = "";
      license = "LGPL 2";
      description = "Interface to Linux inotify subsystem";
    };

    # No tests distributed
    doCheck = false;
  };
  # Defines our node.js package
  dparser = myPythonPackages.buildPythonPackage {
    name = "dparser";
    builder=./dparserb.sh;
    # Where to download sources from
    src = pkgs.fetchgit {
      url = https://github.com/jplevyak/dparser.git;
      rev = "246a343b01da98b2062c6c56f258ececf798d7f7";
      sha256 = "93e87d89680112c1e2996e27542d6316d79cbb74215c6c946f1dc639d6df04c7";
    };
    buildInputs = with pkgs ; [ which swig ] ;
    };
  myCython = stdenv.lib.overrideDerivation pkgs.pythonPackages.cython (attrs: {
    patches =  [ ./cython-memoryview.patch ];
    doCheck = false;
    });
in
      myPythonPackages.buildPythonPackage {
        name = "myproject";
	propogatedBuildInputs = [which dparser ];
        buildInputs = with pkgs.python27Packages.override { python=myPython ; }  ;
	    [ Keras tensorflow jedi.overrideAttrs( oldAttrs: rec { doCheck = false; }) theano inotify pathpy pyyaml fasteners jupyter emacs25 which myCython gdb numpy time celery cherrypy redis openpyxl requests dateutil pyinotify scipy tables pandas argparse dparser sh pathpy ];
        #src = ./.;
        #shellHook = ''
        #  . env.sh;
        #  cd ../dserver/src
       #'';
      }