diff --git a/pkgs/development/tools/misc/hydra/default.nix b/pkgs/development/tools/misc/hydra/default.nix
index f4f72491970..425ffd8f03f 100644
--- a/pkgs/development/tools/misc/hydra/default.nix
+++ b/pkgs/development/tools/misc/hydra/default.nix
@@ -40,6 +40,7 @@ let
         FileSlurp
         IOCompress
         IPCRun
+        JSON
         JSONAny
         JSONXS
         LWP