It builds now.

modules/system/accounts/users/jimbo/default.nix

@@ -1,11 +1,11 @@
-{ pkgs, outputs, ... }:
+{ pkgs, config, ... }:
 {
   users.users = {
     jimbo = {
       description = "Jimbo";
-      hashedPassword = outputs.secrets.jimboAccPass;
+      hashedPassword = config.secrets.jimboAccPass;
       isNormalUser = true;
-      openssh.authorizedKeys.keys = outputs.secrets.jimKeys;
+      openssh.authorizedKeys.keys = config.secrets.jimKeys;
       extraGroups = [
         "wheel"
         "audio"

modules/system/accounts/users/liquidsoap/default.nix

@@ -1,10 +1,12 @@
 { ... }:
 {
-  users.users = {
-    nextcloud = {
+  users = {
+    users.liquidsoap = {
+      group = "liquidsoap";
       extraGroups = [ "nginx" ];
       isSystemUser = true;
       uid = 155;
     };
+    groups.liquidsoap = {};
   };
 }

modules/system/accounts/users/nextcloud/default.nix

@@ -1,9 +1,12 @@
-{ ... }: {
-  users.users = { 
-    nextcloud = {
+{ ... }:
+{
+  users = {
+    users.nextcloud = {
+      group = "nextcloud";
       extraGroups = [ "nfsShare" ];
       isSystemUser = true;
       uid = 995;
     };
+    groups.nextcloud = {};
   };
 }

modules/system/accounts/users/nginx/default.nix

@@ -1,10 +1,12 @@
 { ... }:
 {
-  users.users = { 
-    nginx = {
+  users = {
+    users.nginx = {
+      group = "nginx";
       extraGroups = [ "turnserver" "virtualMail" ];
       isSystemUser = true;
       uid = 60;
     };
+    groups.nginx = {};
   };
 }