diff --git a/pkgs/tools/text/reckon/default.nix b/pkgs/tools/text/reckon/default.nix
index b6340fd2df4..de03963a412 100644
--- a/pkgs/tools/text/reckon/default.nix
+++ b/pkgs/tools/text/reckon/default.nix
@@ -7,9 +7,7 @@ stdenv.mkDerivation rec {
   env = bundlerEnv {
     name = "${name}-gems";
 
-    gemfile = ./Gemfile;
-    lockfile = ./Gemfile.lock;
-    gemset = ./gemset.nix;
+    gemdir = ./.;
   };
 
   phases = [ "installPhase" ];