1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/authheaders/default.nix b/nixpkgs/pkgs/development/python-modules/authheaders/default.nix
index 6762e4b3ad7a..3f73af498036 100644
--- a/nixpkgs/pkgs/development/python-modules/authheaders/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/authheaders/default.nix
@@ -51,6 +51,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Python library for the generation of email authentication headers";
+    mainProgram = "dmarc-policy-find";
     homepage = "https://github.com/ValiMail/authentication-headers";
     changelog = "https://github.com/ValiMail/authentication-headers/blob${version}/CHANGES";
     license = licenses.mit;