1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/beancount-black/default.nix b/nixpkgs/pkgs/development/python-modules/beancount-black/default.nix
index 9dcd709bff11..f1e1ee3a4b02 100644
--- a/nixpkgs/pkgs/development/python-modules/beancount-black/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/beancount-black/default.nix
@@ -41,6 +41,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Opinioned code formatter for Beancount";
+    mainProgram = "bean-black";
     homepage = "https://github.com/LaunchPlatform/beancount-black/";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ ambroisie ];