diff --git a/pkgs/applications/networking/mailreaders/notmuch/default.nix b/pkgs/applications/networking/mailreaders/notmuch/default.nix
index 322bd2db903f..37c90f1b2f0f 100644
--- a/pkgs/applications/networking/mailreaders/notmuch/default.nix
+++ b/pkgs/applications/networking/mailreaders/notmuch/default.nix
@@ -146,5 +146,6 @@ stdenv.mkDerivation rec {
     license     = licenses.gpl3Plus;
     maintainers = with maintainers; [ flokli puckipedia ];
     platforms   = platforms.unix;
+    mainProgram = "notmuch";
   };
 }