diff --git a/pkgs/applications/graphics/unigine-valley/default.nix b/pkgs/applications/graphics/unigine-valley/default.nix
index 8fef29fa107..d2b3756cecb 100644
--- a/pkgs/applications/graphics/unigine-valley/default.nix
+++ b/pkgs/applications/graphics/unigine-valley/default.nix
@@ -16,7 +16,6 @@
 
 let
   version = "1.0";
-  pkgversion = "1";
 
   arch = if stdenv.system == "x86_64-linux" then
     "x64"
@@ -27,7 +26,7 @@ let
 
 in
   stdenv.mkDerivation {
-    name = "unigine-valley-${version}-${pkgversion}";
+    name = "unigine-valley-${version}";
 
     src = fetchurl {
       url = "http://assets.unigine.com/d/Unigine_Valley-${version}.run";