diff --git a/modules/system/nix/module.nix b/modules/system/nix/module.nix
index 8bae420..80e2b4c 100644
--- a/modules/system/nix/module.nix
+++ b/modules/system/nix/module.nix
@@ -51,6 +51,9 @@ in {
       dates = ["21:00"];
     };
 
+    # NOTE:
+    # Writes the settings to /etc/nix/nix.conf.
+    # See `man nix.conf` for more detailed descriptions of these settings.
     settings = {
       # Tell nix to use the xdg spec for base directories
       # while transitioning, any state must be carried over
@@ -69,7 +72,14 @@ in {
       # Let the system decide the number of max jobs
       # based on available system specs. Usually this is
       # the same as the number of cores your CPU has.
-      max-jobs = 2;
+      max-jobs = "auto";
+
+      # This option defines the maximum number of concurrent tasks during one build.
+      # It affects, e.g., -j option for make. The special value 0 means that the builder
+      # should use all available CPU cores in the system. Some builds may become
+      # non-deterministic with this option; use with care!
+      # Packages will only be affected if enableParallelBuilding is set for them.
+      cores = 0;
 
       # If set, Nix will perform builds in a sandboxed environment
       # that it will set up automatically for each build.