diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 1614c92808ff..2e02241d3042 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -100,7 +100,7 @@ let
 
 in {
 
-  inherit (python.passthru) isPy27 isPy33 isPy34 isPy35 isPy36 isPy37 isPy3k isPyPy pythonAtLeast pythonOlder;
+  inherit (python.passthru) isPy27 isPy33 isPy34 isPy35 isPy36 isPy37 isPy38 isPy3k isPyPy pythonAtLeast pythonOlder;
   inherit python bootstrapped-pip buildPythonPackage buildPythonApplication;
   inherit fetchPypi callPackage;
   inherit hasPythonModule requiredPythonModules makePythonPath disabledIf;