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fix(205-builder): aggressive nix GC — daily+7d to prevent disk full alerts - #43

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autofix/diskwillfillin24h-205-builder-gc
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fix(205-builder): aggressive nix GC — daily+7d to prevent disk full alerts#43
phonkd wants to merge 1 commit into
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autofix/diskwillfillin24h-205-builder-gc

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@phonkd

@phonkd phonkd commented Jul 23, 2026

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Two DiskWillFillIn24h alerts are firing on 205-builder (both / and /nix/store mountpoints on the same ext4 partition). The root cause is that nix GC runs weekly with 30-day retention, which is not aggressive enough for a dedicated build machine.

Override the global nix.gc in the builder-server role module: daily+7d instead of weekly+30d.

After merge, deploy 205-builder to activate.

DiskWillFillIn24h is firing on 205-builder because the weekly+30d nix GC
can't keep up with build artifact accumulation on the builder's root
partition. Override to daily+7d GC for the builder-server role.

Closes the alert by addressing the root cause.
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