1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/cysignals/default.nix b/nixpkgs/pkgs/development/python-modules/cysignals/default.nix
index fe0ca2e17a09..107b552a631c 100644
--- a/nixpkgs/pkgs/development/python-modules/cysignals/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/cysignals/default.nix
@@ -48,6 +48,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Interrupt and signal handling for Cython";
+    mainProgram = "cysignals-CSI";
     homepage = "https://github.com/sagemath/cysignals/";
     maintainers = teams.sage.members;
     license = licenses.lgpl3Plus;