diff --git a/pkgs/default.nix b/pkgs/default.nix
index bfccfcc..8434b60 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -55,7 +55,7 @@ self: super:
     clean &
   '';
 
-  myAt = pkgs.writeScriptBin "at" ''
+  myAt = super.writeScriptBin "at" ''
     echo "Running cmd in $(( $(date -d "$1" +%s) - $(date +%s) )) seconds"
     sleep $(( $(date -d "$1" +%s) - $(date +%s) ))
     shift 1