diff --git a/pkgs/development/tools/continuous-integration/buildbot/master.nix b/pkgs/development/tools/continuous-integration/buildbot/master.nix
index 68566ca93c79..8de60461f730 100644
--- a/pkgs/development/tools/continuous-integration/buildbot/master.nix
+++ b/pkgs/development/tools/continuous-integration/buildbot/master.nix
@@ -8,6 +8,7 @@
 , buildbot
 , pythonOlder
 , python
+, pythonRelaxDepsHook
 , twisted
 , jinja2
 , msgpack
@@ -81,6 +82,14 @@ buildPythonApplication rec {
     hash = "sha256-ruYW1sVoGvFMi+NS+xiNsn0Iq2RmKlax4bxHgYrj6ZY=";
   };
 
+  build-system = [
+    pythonRelaxDepsHook
+  ];
+
+  pythonRelaxDeps = [
+    "twisted"
+  ];
+
   propagatedBuildInputs = [
     # core
     twisted