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ci: build only the site in Build and Deploy - #1302
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nix-build without -A builds every derivation default.nix exposes, so each master and PR build also built the development shell (Node.js, netlify-cli, devmode, ...), the update scripts and the CI tools, none of which the deploy uses. The last successful master build fetched 785 paths (1.1 GiB). The extra downloads are not just slow: on 2026-10-23 the build of 2e48a30 failed because a transient cache.nixos.org error interrupted the download of nodejs-slim-26.12.0-npm, which only the shell needs. ./result also depended on attribute order: with several derivations, result is the first one, which was the site only because "build" sorts before the others.
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nix-build without -A builds every derivation default.nix exposes, so each master and PR build also built the development shell (Node.js, netlify-cli, devmode, ...), the update scripts and the CI tools, none of which the deploy uses. The last successful master build fetched 785 paths (1.1 GiB).
The extra downloads are not just slow: on 2026-10-23 the build of 2e48a30 failed because a transient cache.nixos.org error interrupted the download of nodejs-slim-26.12.0-npm, which only the shell needs.
./result also depended on attribute order: with several derivations, result is the first one, which was the site only because "build" sorts before the others.