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-rw-r--r--nixos/modules/services/misc/nix-daemon.nix7
1 files changed, 6 insertions, 1 deletions
diff --git a/nixos/modules/services/misc/nix-daemon.nix b/nixos/modules/services/misc/nix-daemon.nix
index e2548864af5b..9979c6c9815b 100644
--- a/nixos/modules/services/misc/nix-daemon.nix
+++ b/nixos/modules/services/misc/nix-daemon.nix
@@ -323,7 +323,12 @@ in
         fi
       '';
 
-    users.extraUsers = map makeNixBuildUser (range 1 cfg.nrBuildUsers);
+    users.extraUsers =
+      if cfg.nrBuildUsers >= cfg.maxJobs then
+        map makeNixBuildUser (range 1 cfg.nrBuildUsers)
+      else
+        throw "Not enough build users (${cfg.nrBuildUsers}) to support ${cfg.maxJobs} build jobs. Change nrBuildUsers or maxJobs."
+      ;
 
     system.activationScripts.nix = stringAfter [ "etc" "users" ]
       ''