diff --git a/pkgs/applications/graphics/unigine-tropics/default.nix b/pkgs/applications/graphics/unigine-tropics/default.nix
index f0d5101b4be0..f75aa81e45f5 100644
--- a/pkgs/applications/graphics/unigine-tropics/default.nix
+++ b/pkgs/applications/graphics/unigine-tropics/default.nix
@@ -22,8 +22,8 @@ stdenv.mkDerivation {
   inherit version;
 
   src = fetchurl {
-    url = "http://m12-assets.unigine.com/d/Unigine_Tropics-${version}.run";
-    sha256 = "0icasdp46fjnic7gk83pknjx0gpap9j202dm0llcfg5zin5kbq7x";
+    url = "https://assets.unigine.com/d/Unigine_Tropics-${version}.run";
+    sha256 = "sha256-/eA1i42/PMcoBbUJIGS66j7QpZ13oPkOi1Y6Q27TikU=";
   };
 
   libPath = lib.makeLibraryPath [
@@ -92,5 +92,6 @@ stdenv.mkDerivation {
     license = lib.licenses.unfree;
     maintainers = [ lib.maintainers.BarinovMaxim ];
     platforms = [ "x86_64-linux" "i686-linux" ];
+    mainProgram = "Tropics";
   };
 }