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fix: add writable cache directory for nix git flake fetching

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The listener service had ProtectHome=read-only which prevented Nix
from writing to /root/.cache when fetching git flakes. This adds a
CacheDirectory managed by systemd and sets XDG_CACHE_HOME to use it.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Torjus Håkestad
2026-02-07 05:57:59 +01:00
parent 5f3cfc3d21
commit 9f205fee5e
1 changed files with 5 additions and 1 deletions
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6
nixos/module.nix
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@@ -103,11 +103,15 @@ in
after = [ "network-online.target" ]; after = [ "network-online.target" ];
wants = [ "network-online.target" ]; wants = [ "network-online.target" ];
environment = cfg.environment; environment = cfg.environment // {
# Nix needs a writable cache for git flake fetching
XDG_CACHE_HOME = "/var/cache/homelab-deploy";
};
path = [ pkgs.git config.system.build.nixos-rebuild ]; path = [ pkgs.git config.system.build.nixos-rebuild ];
serviceConfig = { serviceConfig = {
CacheDirectory = "homelab-deploy";
Type = "simple"; Type = "simple";
ExecStart = "${cfg.package}/bin/homelab-deploy listener ${args}"; ExecStart = "${cfg.package}/bin/homelab-deploy listener ${args}";
Restart = "always"; Restart = "always";