1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/networking/mailreaders/msgviewer/default.nix b/nixpkgs/pkgs/applications/networking/mailreaders/msgviewer/default.nix
index fd980893124f..14d2556616c7 100644
--- a/nixpkgs/pkgs/applications/networking/mailreaders/msgviewer/default.nix
+++ b/nixpkgs/pkgs/applications/networking/mailreaders/msgviewer/default.nix
@@ -27,6 +27,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Viewer for .msg files (MS Outlook)";
+    mainProgram = "msgviewer";
     homepage    = "https://www.washington.edu/alpine/";
     sourceProvenance = with sourceTypes; [ binaryBytecode ];
     license     = licenses.asl20;