From ae1e318a9ad4a77d46dc3103a73bb99afd1f2bfb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Fri, 7 Oct 2022 22:17:33 +0200
Subject: [PATCH] Turn automatic nix garbage collection off in microvm

---
 modules/c3d2.nix    | 2 +-
 modules/microvm.nix | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/modules/c3d2.nix b/modules/c3d2.nix
index 13222692..004d25d9 100644
--- a/modules/c3d2.nix
+++ b/modules/c3d2.nix
@@ -397,7 +397,7 @@ in
           );
         };
         gc = {
-          automatic = true;
+          automatic = lib.mkDefault true;
           dates = "06:00";
           options = "--delete-older-than 21d";
           randomizedDelaySec = "6h";
diff --git a/modules/microvm.nix b/modules/microvm.nix
index 7f865942..4d6432c6 100644
--- a/modules/microvm.nix
+++ b/modules/microvm.nix
@@ -167,5 +167,8 @@ in
 
     # autoupdates do not make sense inside MicroVMs with read-only /nix/store
     c3d2.autoUpdate = false;
+
+    # nix store is mounted read only
+    nix.gc.automatic = false;
   };
 }