diff --git a/pkgs/by-name/op/opencode/package.nix b/pkgs/by-name/op/opencode/package.nix
index 2a6a37040f33..b9893fc5f257 100644
--- a/pkgs/by-name/op/opencode/package.nix
+++ b/pkgs/by-name/op/opencode/package.nix
@@ -7,6 +7,7 @@
   models-dev,
   nix-update-script,
   testers,
+  tree-sitter,
   writableTmpDirAsHomeHook,
 }:
 
@@ -107,6 +108,8 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     outputHashMode = "recursive";
   };
 
+  buildInputs = [ tree-sitter ];
+
   nativeBuildInputs = [
     bun
     models-dev