From a7cf56ccd3457a7d9994fd7b4aa674a43792e1bb Mon Sep 17 00:00:00 2001
From: Marius Bakke <marius@gnu.org>
Date: Mon, 31 Oct 2022 01:29:42 +0100
Subject: [PATCH] Save GC root for the instance configuration.

* create (initialize_guix): Add separate 'guix system build' step.
---
 create | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/create b/create
index e59a1fa..a13c9cd 100755
--- a/create
+++ b/create
@@ -314,6 +314,10 @@ initialize_guix(){
     export FS_TYPE="$4"
     local GUIX="$5"
 
+    # Build the system configuration and save GC root.
+    rm -f "$GC_ROOT"
+    $GUIX build --fallback --no-grafts -r "$GC_ROOT" "$GUIX_CONFIG"
+
     # Install GuixSD
     $GUIX init "$GUIX_CONFIG" "$TARGET_ROOT" || {
         echo Failed to guix system init "$GUIX_CONFIG" "$TARGET_ROOT" >&2