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update: offload eval to the server too via remote nix build + --store-path

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rope 2026-08-13 11:49:19 +01:00
parent a6eacab7fb
commit dafd23d159
2 changed files with 23 additions and 3 deletions
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5
services/prebuild.nix
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@ -3,8 +3,9 @@
# Both laptops/desktops offload builds to this host (nix.buildMachines in
# common.nix), and the Macbook can't build at all (max-jobs = 0). Realising
# their toplevels here ahead of time turns `update` on those machines into a
# pure copy: the offloaded build finds the path already in this store and just
# ships it back over SSH.
# pure copy: the client's `update` alias re-runs this exact nix build over SSH
# (so eval happens here too, against a warm eval cache), finds the path already
# realised, and only copies the closure back.
#
# --out-link doubles as the gc root, so `clean` doesn't reap the closures
# before the other machines ever ask for them.