1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/audio/r128gain/default.nix b/nixpkgs/pkgs/applications/audio/r128gain/default.nix
index 8cf6871a76b4..6cf7f41f10ce 100644
--- a/nixpkgs/pkgs/applications/audio/r128gain/default.nix
+++ b/nixpkgs/pkgs/applications/audio/r128gain/default.nix
@@ -36,6 +36,7 @@ python3Packages.buildPythonApplication rec {
 
   meta = with lib; {
     description = "Fast audio loudness scanner & tagger (ReplayGain v2 / R128)";
+    mainProgram = "r128gain";
     homepage = "https://github.com/desbma/r128gain";
     license = licenses.lgpl2Plus;
     maintainers = [ maintainers.AluisioASG ];