diff --git a/pkgs/applications/window-managers/i3/lock-color.nix b/pkgs/applications/window-managers/i3/lock-color.nix
index cea706f8e84f..c9cbe06ba560 100644
--- a/pkgs/applications/window-managers/i3/lock-color.nix
+++ b/pkgs/applications/window-managers/i3/lock-color.nix
@@ -88,6 +88,7 @@ stdenv.mkDerivation rec {
     '';
     homepage = "https://github.com/PandorasFox/i3lock-color";
     maintainers = with maintainers; [ malyn ];
+    mainProgram = "i3lock-color";
     license = licenses.bsd3;
 
     platforms = platforms.all;