diff --git a/flake.nix b/flake.nix
index dd9ada2..8eba36f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -335,6 +335,7 @@
               "python-lmdb"
               "artiq-comtools"
               "platformdirs"
+              "jsonschema"
             ];
           }