diff --git a/pkgs/development/tools/continuous-integration/buildbot/pkg.nix b/pkgs/development/tools/continuous-integration/buildbot/pkg.nix
index 71a79c8132e3..da9e088cefcf 100644
--- a/pkgs/development/tools/continuous-integration/buildbot/pkg.nix
+++ b/pkgs/development/tools/continuous-integration/buildbot/pkg.nix
@@ -18,6 +18,8 @@ buildPythonPackage {
     substituteInPlace buildbot_pkg.py --replace "os.listdir = listdir" ""
   '';
 
+  env.BUILDBOT_VERSION = buildbot.version;
+
   build-system = [ setuptools ];
 
   # No tests