diff --git a/pkgs/development/python-modules/pysolcast/default.nix b/pkgs/development/python-modules/pysolcast/default.nix
index 5e740e78e6a8..1eab58761440 100644
--- a/pkgs/development/python-modules/pysolcast/default.nix
+++ b/pkgs/development/python-modules/pysolcast/default.nix
@@ -9,6 +9,7 @@
 , requests
 , responses
 , poetry-core
+, pythonRelaxDepsHook
 }:
 
 buildPythonPackage rec {
@@ -25,8 +26,13 @@ buildPythonPackage rec {
     hash = "sha256-jLhM47o6LvkPux0kusOrRk4TDS6VLWE0QMEiQxlBCwo=";
   };
 
+  pythonRelaxDeps = [
+    "responses"
+  ];
+
   nativeBuildInputs = [
     poetry-core
+    pythonRelaxDepsHook
   ];
 
   propagatedBuildInputs = [