1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/applications/science/electronics/tkgate/1.x.nix b/pkgs/applications/science/electronics/tkgate/1.x.nix
index f8741cd8d180..f20ce5e0acd0 100644
--- a/pkgs/applications/science/electronics/tkgate/1.x.nix
+++ b/pkgs/applications/science/electronics/tkgate/1.x.nix
@@ -35,6 +35,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Event driven digital circuit simulator with a TCL/TK-based graphical editor";
+    mainProgram = "gmac";
     homepage = "http://www.tkgate.org/";
     license = lib.licenses.gpl2Plus;
     hydraPlatforms = lib.platforms.linux;