diff --git a/pkgs/tools/backup/backup/default.nix b/pkgs/tools/backup/backup/default.nix
index 1890e8121c18..20c96b65a624 100644
--- a/pkgs/tools/backup/backup/default.nix
+++ b/pkgs/tools/backup/backup/default.nix
@@ -4,9 +4,7 @@ bundlerEnv {
   name = "backup_v4";
 
   ruby = ruby_2_1;
-  gemfile = ./Gemfile;
-  lockfile = ./Gemfile.lock;
-  gemset = ./gemset.nix;
+  gemdir = ./.;
 
   buildInputs = [ curl ];