diff --git a/flake.nix b/flake.nix
index e4a60a5654..e720f28df7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -30,6 +30,7 @@
             gotestsum
             jq
             kubernetes-helm
+            mockgen
             nfpm
             nodePackages.typescript
             nodePackages.typescript-language-server