diff --git a/scripts/install-multi-user.sh b/scripts/install-multi-user.sh
index a08f62333..e0313ab26 100644
--- a/scripts/install-multi-user.sh
+++ b/scripts/install-multi-user.sh
@@ -23,11 +23,17 @@ readonly RED='\033[31m'
 # installer allows overriding build user count to speed up installation
 # as creating each user takes non-trivial amount of time on macos
 readonly NIX_USER_COUNT=${NIX_USER_COUNT:-32}
-readonly NIX_BUILD_GROUP_ID="${NIX_BUILD_GROUP_ID:-30000}"
 readonly NIX_BUILD_GROUP_NAME="nixbld"
+<<<<<<< HEAD
 # darwin installer needs to override these
 NIX_FIRST_BUILD_UID="${NIX_FIRST_BUILD_UID:-30001}"
 NIX_BUILD_USER_NAME_TEMPLATE="nixbld%d"
+=======
+# each system specific installer must set these:
+#   NIX_FIRST_BUILD_UID
+#   NIX_BUILD_GROUP_ID
+#   NIX_BUILD_USER_NAME_TEMPLATE
+>>>>>>> 75567423f (install-darwin: move nixbld gid to match first UID)
 # Please don't change this. We don't support it, because the
 # default shell profile that comes with Nix doesn't support it.
 readonly NIX_ROOT="/nix"
@@ -530,9 +536,7 @@ It seems the build group $NIX_BUILD_GROUP_NAME already exists, but
 with the UID $primary_group_id. This script can't really handle
 that right now, so I'm going to give up.
 
-You can fix this by editing this script and changing the
-NIX_BUILD_GROUP_ID variable near the top to from $NIX_BUILD_GROUP_ID
-to $primary_group_id and re-run.
+You can export NIX_BUILD_GROUP_ID=$primary_group_id and re-run.
 EOF
         else
             row "            Exists" "Yes"
diff --git a/scripts/install-systemd-multi-user.sh b/scripts/install-systemd-multi-user.sh
index 07b34033a..a5857e689 100755
--- a/scripts/install-systemd-multi-user.sh
+++ b/scripts/install-systemd-multi-user.sh
@@ -3,6 +3,14 @@
 set -eu
 set -o pipefail
 
+<<<<<<< HEAD
+=======
+# System specific settings
+export NIX_FIRST_BUILD_UID="${NIX_FIRST_BUILD_UID:-30001}"
+export NIX_BUILD_GROUP_ID="${NIX_BUILD_GROUP_ID:-30000}"
+export NIX_BUILD_USER_NAME_TEMPLATE="nixbld%d"
+
+>>>>>>> 75567423f (install-darwin: move nixbld gid to match first UID)
 readonly SERVICE_SRC=/lib/systemd/system/nix-daemon.service
 readonly SERVICE_DEST=/etc/systemd/system/nix-daemon.service