diff --git a/krebs/5pkgs/simple/buildbot-classic/default.nix b/krebs/5pkgs/simple/buildbot-classic/default.nix
index 665b36ab4..c127d2987 100644
--- a/krebs/5pkgs/simple/buildbot-classic/default.nix
+++ b/krebs/5pkgs/simple/buildbot-classic/default.nix
@@ -17,7 +17,7 @@ python2Packages.buildPythonApplication rec {
   propagatedBuildInputs = [
     python2Packages.jinja2
     python2Packages.twisted
-    python2Packages.dateutil_1_5
+    python2Packages.dateutil
     python2Packages.sqlalchemy_migrate
     python2Packages.pysqlite
     pkgs.coreutils