diff --git a/pkgs/by-name/me/memtree/package.nix b/pkgs/by-name/me/memtree/package.nix
index bc82a9063dcf..68e990456e75 100644
--- a/pkgs/by-name/me/memtree/package.nix
+++ b/pkgs/by-name/me/memtree/package.nix
@@ -41,6 +41,7 @@ python3Packages.buildPythonApplication {
     description = "Render cgroups tree annotated by memory usage";
     homepage = "https://github.com/nbraud/memtree";
     maintainers = with maintainers; [ nicoo ];
+    mainProgram = "memtree";
     platforms = platforms.linux;
   };
 }