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-rw-r--r--pkgs/applications/science/astronomy/xplanet/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/applications/science/astronomy/xplanet/default.nix b/pkgs/applications/science/astronomy/xplanet/default.nix
index 94aa92a1b713..677bc0cdf077 100644
--- a/pkgs/applications/science/astronomy/xplanet/default.nix
+++ b/pkgs/applications/science/astronomy/xplanet/default.nix
@@ -30,6 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Renders an image of the earth or other planets into the X root window";
+    mainProgram = "xplanet";
     homepage = "https://xplanet.sourceforge.net";
     license = licenses.gpl2;
     maintainers = with maintainers; [ lassulus sander ];