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fix(nh): drop the automatic GC timer; keep nh for rebuilds

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The scheduled `nh clean` only reclaimed disk and risked reaping store
paths the current generation still references (notably on nix-darwin).
Keep `programs.nh` (nicer rebuilds + $NH_FLAKE) but remove clean.enable;
GC manually (`nh clean all` / `nix-collect-garbage -d`) when nothing
important is running. The resetZcompdump activation stays as a safety net
for stale completion dumps across rebuilds/manual GC.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Emma Thorpe
2026-06-10 13:51:05 +01:00
committed by lyrathorpe
parent 2013bffcb1
commit 26807cdb55
1 changed files with 9 additions and 10 deletions
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lyrathorpe/home/shell.nix
+9 -10
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@@ -126,15 +126,14 @@
programs.nix-index.enable = true;
programs.nix-index-database.comma.enable = true;
# Nicer nixos-rebuild/home-manager (diffs) + a weekly user-GC timer.
# Nicer nixos-rebuild/home-manager (diffs) + $NH_FLAKE. No automatic clean:
# the scheduled GC's only benefit is reclaiming disk, but it can reap store
# paths the current generation still references (notably on nix-darwin, where
# it broke completion by removing an in-use oh-my-zsh). GC manually instead:
# `nh clean all` / `nix-collect-garbage -d` when nothing important is running.
programs.nh = {
enable = true;
flake = "$HOME/code/nixfiles";
clean = {
enable = true;
dates = "weekly";
extraArgs = "--keep 5 --keep-since 3d";
};
};
programs.tmux = {
@@ -260,10 +259,10 @@
services.ssh-agent.enable = lib.mkIf pkgs.stdenv.hostPlatform.isLinux true;
# Drop the zsh completion dump on every activation. A stale ~/.zcompdump
# caches /nix/store paths to completion functions; once a rebuild or GC (the
# weekly nh clean) removes them, compinit fails with "_git: function
# definition file not found" for every completion. Deleting it forces a fresh
# rebuild from the current fpath on the next shell.
# caches /nix/store paths to completion functions; once a rebuild or a manual
# GC removes them, compinit fails with "_git: function definition file not
# found" for every completion. Deleting it forces a fresh rebuild from the
# current fpath on the next shell.
home.activation.resetZcompdump = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
$DRY_RUN_CMD rm -f "$HOME"/.zcompdump* "''${XDG_CACHE_HOME:-$HOME/.cache}"/zsh/.zcompdump* 2>/dev/null || true
'';