diff --git a/pkgs/development/python-modules/hologram/default.nix b/pkgs/development/python-modules/hologram/default.nix
index 005834fc99b8..30f50456bad9 100644
--- a/pkgs/development/python-modules/hologram/default.nix
+++ b/pkgs/development/python-modules/hologram/default.nix
@@ -5,6 +5,7 @@
 , jsonschema
 , pytestCheckHook
 , python-dateutil
+, pythonRelaxDepsHook
 , setuptools
 , wheel
 }:
@@ -31,6 +32,7 @@ buildPythonPackage rec {
   ];
 
   nativeBuildInputs = [
+    pythonRelaxDepsHook
     setuptools
     wheel
   ];
@@ -44,6 +46,10 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  pythonRelaxDeps = [
+    "python-dateutil"
+  ];
+
   pythonImportsCheck = [
     "hologram"
   ];