diff --git a/pkgs/by-name/fn/fna3d/package.nix b/pkgs/by-name/fn/fna3d/package.nix
index 08862d304a6f..162210bbccd4 100644
--- a/pkgs/by-name/fn/fna3d/package.nix
+++ b/pkgs/by-name/fn/fna3d/package.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     homepage = "https://fna-xna.github.io/";
     license = lib.licenses.mspl;
     platforms = lib.platforms.linux;
-    mainProgram = pname;
+    mainProgram = "fna3d";
     maintainers = with lib.maintainers; [ mrtnvgr ];
   };
 }