diff --git a/pkgs/development/python-modules/shouldbe/default.nix b/pkgs/development/python-modules/shouldbe/default.nix
index 1623d216ac9..068ed934311 100644
--- a/pkgs/development/python-modules/shouldbe/default.nix
+++ b/pkgs/development/python-modules/shouldbe/default.nix
@@ -1,5 +1,6 @@
 { stdenv
 , buildPythonPackage
+, pythonAtLeast
 , fetchPypi
 , nose
 , forbiddenfruit
@@ -8,6 +9,8 @@
 buildPythonPackage rec {
   version = "0.1.2";
   pname = "shouldbe";
+  # incompatible, https://github.com/DirectXMan12/should_be/issues/4
+  disabled = pythonAtLeast "3.8";
 
   src = fetchPypi {
     inherit pname version;