diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index 664aed7fbc9..0954e6185af 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -129,7 +129,7 @@
       foundationdb = 118;
       newrelic = 119;
       starbound = 120;
-      hydra     = 121;
+      hydra     = 122;
 
       # When adding a uid, make sure it doesn't match an existing gid.
 
@@ -233,6 +233,7 @@
       newrelic = 119;
       starbound = 120;
       grsecurity = 121;
+      hydra = 122;
 
       # When adding a gid, make sure it doesn't match an existing uid.