diff --git a/lib/install-nix.sh b/lib/install-nix.sh
index 82b50f3..31304ee 100755
--- a/lib/install-nix.sh
+++ b/lib/install-nix.sh
@@ -30,7 +30,7 @@ installer_options=(
 if [[ $OSTYPE =~ darwin || -e /run/systemd/system ]]; then
   installer_options+=(
     --daemon
-    --daemon-user-count 4
+    --daemon-user-count `python -c 'import multiprocessing as mp; print(mp.cpu_count() * 2)'`
   )
 else
   # "fix" the following error when running nix*