nix-super/src/nix/store-copy-log.md

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Examples

• To copy the build log of the hello package from https://cache.nixos.org to the local store:

  # nix store copy-log --from https://cache.nixos.org --eval-store auto nixpkgs#hello
  

  You can verify that the log is available locally:

  # nix log --substituters '' nixpkgs#hello
  

  (The flag --substituters '' avoids querying https://cache.nixos.org for the log.)

• To copy the log for a specific store derivation via SSH:

  # nix store copy-log --to ssh-ng://machine /nix/store/ilgm50plpmcgjhcp33z6n4qbnpqfhxym-glibc-2.33-59.drv
  

Description

nix store copy-log copies build logs between two Nix stores. The source store is specified using --from and the destination using --to. If one of these is omitted, it defaults to the local store.

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