diff --git a/dune-project b/dune-project
index b5abbc8..b33dc49 100644
--- a/dune-project
+++ b/dune-project
@@ -44,5 +44,6 @@
    (ocaml (>= "5.1"))
    (colors (>= "0.0.1"))
    (mdx (and :with-test (>= "2.3.1")))
-   (tty (>= "0.0.2")))
+   (tty (>= "0.0.2"))
+   uuseg)
  (tags (styling styles declarative framework tui "terminal-ui" apps)))
diff --git a/flake.nix b/flake.nix
index f3293ba..5447679 100644
--- a/flake.nix
+++ b/flake.nix
@@ -24,7 +24,11 @@
             devShells = {
               default = mkShell {
                 buildInputs = [ ocamlPackages.utop ];
-                inputsFrom = [ self'.packages.spices self'.packages.default self'.packages.leaves ];
+                inputsFrom = [
+                  self'.packages.spices
+                  self'.packages.default
+                  self'.packages.leaves
+                ];
               };
             };
 
@@ -63,6 +67,7 @@
                   (mdx.override {
                     inherit logs;
                   })
+                  uuseg
                 ];
                 src = ./.;
               };