diff --git a/pkgs/development/tools/redis-dump/default.nix b/pkgs/development/tools/redis-dump/default.nix
index bc1adf730a35..054517ea547c 100644
--- a/pkgs/development/tools/redis-dump/default.nix
+++ b/pkgs/development/tools/redis-dump/default.nix
@@ -4,9 +4,7 @@ bundlerEnv {
   name = "redis-dump-0.3.5";
 
   inherit ruby;
-  gemfile = ./Gemfile;
-  lockfile = ./Gemfile.lock;
-  gemset = ./gemset.nix;
+  gemdir = ./.;
 
   buildInputs = [ perl autoconf ];