diff --git a/pkgs/by-name/h2/h2o/package.nix b/pkgs/by-name/h2/h2o/package.nix
index b5b838945881..c1f29fc62e27 100644
--- a/pkgs/by-name/h2/h2o/package.nix
+++ b/pkgs/by-name/h2/h2o/package.nix
@@ -55,6 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
       toastal
       thoughtpolice
     ];
+    mainProgram = "h2o";
     platforms = platforms.linux;
   };
 })