diff --git a/pkgs/development/interpreters/pyrex/0.9.5.nix b/pkgs/development/interpreters/pyrex/0.9.5.nix
index 3f6a3c1bfcb2..b67ad3db2ef5 100644
--- a/pkgs/development/interpreters/pyrex/0.9.5.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.5.nix
@@ -1,8 +1,8 @@
-{ stdenv, fetchurl, pythonPackages }:
+{ stdenv, fetchurl, python2Packages }:
 
 let version = "0.9.5.1.1"; in
 
-pythonPackages.buildPythonPackage rec {
+python2Packages.buildPythonPackage rec {
   name = "pyrex-${version}";
 
   src = fetchurl {
diff --git a/pkgs/development/interpreters/pyrex/0.9.6.nix b/pkgs/development/interpreters/pyrex/0.9.6.nix
index 44e014322ff4..7a0ac5a1e229 100644
--- a/pkgs/development/interpreters/pyrex/0.9.6.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.6.nix
@@ -1,8 +1,8 @@
-{ stdenv, fetchurl, pythonPackages }:
+{ stdenv, fetchurl, python2Packages }:
 
 let version = "0.9.6.4"; in
 
-pythonPackages.buildPythonPackage rec {
+python2Packages.buildPythonPackage rec {
   name = "pyrex-${version}";
 
   src = fetchurl {