diff --git a/scripts/bigsur-nixbld-user-migration.sh b/scripts/bigsur-nixbld-user-migration.sh
index 0eb312e07cd9..1b4d30856aa0 100755
--- a/scripts/bigsur-nixbld-user-migration.sh
+++ b/scripts/bigsur-nixbld-user-migration.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-((NEW_NIX_FIRST_BUILD_UID=301))
+((NEW_NIX_FIRST_BUILD_UID=331))
 
 id_available(){
 	dscl . list /Users UniqueID | grep -E '\b'"$1"'\b' >/dev/null
diff --git a/scripts/install-darwin-multi-user.sh b/scripts/install-darwin-multi-user.sh
index 24c9052f91cb..ba6a4940fc49 100644
--- a/scripts/install-darwin-multi-user.sh
+++ b/scripts/install-darwin-multi-user.sh
@@ -4,7 +4,7 @@ set -eu
 set -o pipefail
 
 # System specific settings
-export NIX_FIRST_BUILD_UID="${NIX_FIRST_BUILD_UID:-301}"
+export NIX_FIRST_BUILD_UID="${NIX_FIRST_BUILD_UID:-331}"
 export NIX_BUILD_USER_NAME_TEMPLATE="_nixbld%d"
 
 readonly NIX_DAEMON_DEST=/Library/LaunchDaemons/org.nixos.nix-daemon.plist