diff --git a/pkgs/os-specific/linux/sysstat/default.nix b/pkgs/os-specific/linux/sysstat/default.nix
index 3d6e6528d2c5..ea37545672ed 100644
--- a/pkgs/os-specific/linux/sysstat/default.nix
+++ b/pkgs/os-specific/linux/sysstat/default.nix
@@ -32,6 +32,7 @@ stdenv.mkDerivation rec {
   patches = [ ./install.patch ];
 
   meta = {
+    mainProgram = "iostat";
     homepage = "http://sebastien.godard.pagesperso-orange.fr/";
     description = "Collection of performance monitoring tools for Linux (such as sar, iostat and pidstat)";
     license = lib.licenses.gpl2Plus;