diff --git a/pkgs/development/python-modules/private-gpt/default.nix b/pkgs/development/python-modules/private-gpt/default.nix
index 7012ff5cf5fc9..765132c92ba52 100644
--- a/pkgs/development/python-modules/private-gpt/default.nix
+++ b/pkgs/development/python-modules/private-gpt/default.nix
@@ -42,6 +42,8 @@ buildPythonPackage rec {
 
   build-system = [ poetry-core ];
 
+  pythonRelaxDeps = [ "fastapi" ];
+
   dependencies = [
     fastapi
     injector