diff --git a/pkgs/by-name/gs/gscreenshot/package.nix b/pkgs/by-name/gs/gscreenshot/package.nix
index 044b16161003..aa5eb36c3410 100644
--- a/pkgs/by-name/gs/gscreenshot/package.nix
+++ b/pkgs/by-name/gs/gscreenshot/package.nix
@@ -90,6 +90,7 @@ python3Packages.buildPythonApplication (finalAttrs: {
     homepage = "https://github.com/thenaterhood/gscreenshot";
     license = lib.licenses.gpl2Only;
     platforms = lib.platforms.linux;
+    mainProgram = "gscreenshot";
     maintainers = [ lib.maintainers.davisrichard437 ];
   };
 })