From 8d3a2697d1df001576ab6fb7ca236f3ffcc45d05 Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.dev>
Date: Tue, 10 Sep 2024 22:35:41 +0100
Subject: [PATCH] Error: unsupported tarball input attribute 'lastModified'

---
 source/_notes/22.md |  4 +---
 source/_notes/23.md | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 3 deletions(-)
 create mode 100644 source/_notes/23.md

diff --git a/source/_notes/22.md b/source/_notes/22.md
index ec700f8..b10c333 100644
--- a/source/_notes/22.md
+++ b/source/_notes/22.md
@@ -14,7 +14,7 @@ For example:
 services:
   mariadb:
     image: mariadb:10.9.3
-    command: --max_allowed_packet=1GB
+    command: --max_allowed_packet=5GB
     volumes:
       - "./backend_db/mariadb.storage:/var/lib/mysql"
     ports:
@@ -23,5 +23,3 @@ services:
 ```
 
 No Dockerfiles or configuration files needed.
-
-It can't be more than 1GB, though.
diff --git a/source/_notes/23.md b/source/_notes/23.md
new file mode 100644
index 0000000..b0ea7ec
--- /dev/null
+++ b/source/_notes/23.md
@@ -0,0 +1,33 @@
+---
+title: "Error: unsupported tarball input attribute 'lastModified'"
+date: 2024-09-10 22:35:41
+tags: [Linux, Nix, NixOS]
+links:
+  - https://discourse.nixos.org/t/error-unsupported-tarball-input-attribute-lastmodified/49435/4
+---
+
+Yesterday, my laptop died and I needed to resurrect a spare laptop to work on.
+
+This laptop was running an outdated version of NixOS, old packages, a different window manager and other things, so I tried to update it to bring it up to date so it's up to date with my dead laptop's configuration.
+
+Doing so, though, gave me this error:
+
+> Error: unsupported tarball input attribute ‘lastModified’
+
+A normal `sudo nixos-rebuild switch` worked, but trying to use a Flake was generating the error.
+
+I was able to get it working after running these commands from a Discourse thread:
+
+```shell
+nix shell "github:NixOS/nix/2.18.4"
+
+nix build .#nixosConfigurations.nixedo.config.system.build.toplevel
+
+sudo nix-env --profile /nix/var/nix/profiles/system --set ./result
+
+./result/bin/switch-to-configuration switch
+```
+
+I also needed to add `--experimental-features 'nix-command flakes'` to the `nix` commands to get them to run.
+
+Once this finished, I was able to reboot and get a running up-to-date configuration.