1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/science/math/ripser/default.nix b/pkgs/applications/science/math/ripser/default.nix
index 651ad8a2c0f8..21948a279d07 100644
--- a/pkgs/applications/science/math/ripser/default.nix
+++ b/pkgs/applications/science/math/ripser/default.nix
@@ -13,10 +13,10 @@ assert useGoogleHashmap -> sparsehash != null;
 
 let
   inherit (stdenv.lib) optional;
+  version = "1.0";
 in
 stdenv.mkDerivation {
   name = "ripser-${version}";
-  version = "1.0";
 
   src = fetchFromGitHub {
     owner = "Ripser";