diff --git a/nixos/utils.nix b/nixos/utils.nix
index fbce551..8247ccd 100644
--- a/nixos/utils.nix
+++ b/nixos/utils.nix
@@ -15,5 +15,6 @@
     surrealist
     trunk
     sqlx-cli
+    mermaid-cli
   ];
 }