diff --git a/ops/nixos/marukuru/default.nix b/ops/nixos/marukuru/default.nix
index 6369f2cc68..aa9f2065c2 100644
--- a/ops/nixos/marukuru/default.nix
+++ b/ops/nixos/marukuru/default.nix
@@ -69,6 +69,7 @@ in {
     gitAndTools.gitFull
     nodejs
     rxvt_unicode.terminfo
+    python37Packages.pygments
     rebuilder
   ];
   environment.etc."php.d/cache.ini".text = ''
@@ -168,6 +169,9 @@ in {
 
   # Define a user account.
   users.mutableUsers = false;
+  users.groups = {
+    phabricator = {};
+  };
   users.users = {
     root.hashedPassword = secrets.passwordHashes.root;
     lukegb = {