diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9f8da6397a23..b079bdbc0119 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9252,7 +9252,9 @@ let
 
   seyren = callPackage ../servers/monitoring/seyren { };
 
-  sensu = callPackage ../servers/monitoring/sensu { };
+  sensu = callPackage ../servers/monitoring/sensu {
+    ruby = ruby_2_1;
+  };
 
   shishi = callPackage ../servers/shishi { };