1 files changed, 2 insertions, 4 deletions
diff --git a/nixpkgs/pkgs/tools/graphics/twilight/default.nix b/nixpkgs/pkgs/tools/graphics/twilight/default.nix
index 7c43063fb810..58d4d0df9133 100644
--- a/nixpkgs/pkgs/tools/graphics/twilight/default.nix
+++ b/nixpkgs/pkgs/tools/graphics/twilight/default.nix
@@ -1,11 +1,9 @@
 { lib, stdenv, fetchFromGitHub
 , libGL, libGLU, freeglut, libX11 }:
 
-let
-  version = "2018-04-19";
-in stdenv.mkDerivation rec {
+stdenv.mkDerivation rec {
   pname = "twilight";
-  inherit version;
+  version = "unstable-2018-04-19";
 
   src = fetchFromGitHub {
     owner = "tweakoz";