diff --git a/pkgs/by-name/wa/watchman/package.nix b/pkgs/by-name/wa/watchman/package.nix
index 2dc0949a9b3c..7e662f24b40e 100644
--- a/pkgs/by-name/wa/watchman/package.nix
+++ b/pkgs/by-name/wa/watchman/package.nix
@@ -113,6 +113,7 @@ stdenv.mkDerivation (finalAttrs: {
       emily
       techknowlogick
     ];
+    mainProgram = "watchman";
     platforms = lib.platforms.unix;
     license = lib.licenses.mit;
   };