diff --git a/pkgs/development/tools/language-servers/nil/default.nix b/pkgs/development/tools/language-servers/nil/default.nix
index 0df11acc3452..6b3976dfa16b 100644
--- a/pkgs/development/tools/language-servers/nil/default.nix
+++ b/pkgs/development/tools/language-servers/nil/default.nix
@@ -32,5 +32,6 @@ rustPlatform.buildRustPackage rec {
     changelog = "https://github.com/oxalica/nil/releases/tag/${version}";
     license = with licenses; [ mit asl20 ];
     maintainers = with maintainers; [ figsoda oxalica ];
+    mainProgram = "nil";
   };
 }