diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index 375135d..ef35f27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@ vite.config.ts.timestamp-*
 
 # nix
 /result
+/.direnv
 
 # scala
 target
diff --git a/flake.nix b/flake.nix
index 0a47511..05e2814 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,6 +26,7 @@
             nodejs-slim_latest bun
             nodePackages.svelte-language-server
             nodePackages.typescript-language-server
+            sbt
           ];
           shellHook = ''
             export PATH="$PATH:$PWD/node_modules/.bin"