1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/actdiag/default.nix b/nixpkgs/pkgs/development/python-modules/actdiag/default.nix
index 0f1e20041adf..6d04df9d9671 100644
--- a/nixpkgs/pkgs/development/python-modules/actdiag/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/actdiag/default.nix
@@ -42,6 +42,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Generate activity-diagram image from spec-text file (similar to Graphviz)";
+    mainProgram = "actdiag";
     homepage = "http://blockdiag.com/";
     license = licenses.asl20;
     platforms = platforms.unix;