diff --git a/pkgs/os-specific/linux/cpupower/default.nix b/pkgs/os-specific/linux/cpupower/default.nix
index 13e2fc78b821..7c1b031d8334 100644
--- a/pkgs/os-specific/linux/cpupower/default.nix
+++ b/pkgs/os-specific/linux/cpupower/default.nix
@@ -39,6 +39,7 @@ stdenv.mkDerivation {
     description = "Tool to examine and tune power saving features";
     homepage = "https://www.kernel.org/";
     license = licenses.gpl2;
+    mainProgram = "cpupower";
     platforms = platforms.linux;
   };
 }