diff --git a/pkgs/development/python-modules/pycuda/default.nix b/pkgs/development/python-modules/pycuda/default.nix
index 0bd8800eddc..eb7459b0779 100644
--- a/pkgs/development/python-modules/pycuda/default.nix
+++ b/pkgs/development/python-modules/pycuda/default.nix
@@ -13,8 +13,7 @@
 , python
 , mkDerivation
 , stdenv
-, pythonOlder
-, isPy35
+, isPy3k
 }:
 let
   compyte = import ./compyte.nix {
@@ -35,7 +34,7 @@ buildPythonPackage rec {
     ${python.interpreter} configure.py --boost-inc-dir=${boost.dev}/include \
                           --boost-lib-dir=${boost}/lib \
                           --no-use-shipped-boost \
-                          --boost-python-libname=boost_python
+                          --boost-python-libname=boost_python${stdenv.lib.optionalString isPy3k "3"}
   '';
 
   postInstall = ''
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 9f438a64370..80fbc3d544c 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6524,7 +6524,6 @@ in {
   pycuda = callPackage ../development/python-modules/pycuda rec {
     cudatoolkit = pkgs.cudatoolkit75;
     inherit (pkgs.stdenv) mkDerivation;
-    inherit pythonOlder;
   };
 
   pyphen = callPackage ../development/python-modules/pyphen {};