nix3-store-copy-log(1) General Commands Manual nix3-store-copy-log(1) Warning This program is experimental <@docroot@/development/experimental-features.md#xp-feature-nix-command> and its interface is subject to change. Name nix store copy-log - copy build logs between Nix stores Synopsis nix store copy-log [option] installables Examples o To copy the build log of the hello package from 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.) o To copy the log for a specific store derivation <@docroot@/glossary.md#gloss-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. Options o --from <#opt-from> store-uri URL of the source Nix store. o --stdin <#opt-stdin> Read installables from the standard input. No default installable applied. o --to <#opt-to> store-uri URL of the destination Nix store. Common evaluation options o --arg <#opt-arg> name expr Pass the value expr as the argument name to Nix functions. o --arg-from-file <#opt-arg-from-file> name path Pass the contents of file path as the argument name to Nix functions. o --arg-from-stdin <#opt-arg-from-stdin> name Pass the contents of stdin as the argument name to Nix functions. o --argstr <#opt-argstr> name string Pass the string string as the argument name to Nix functions. o --debugger <#opt-debugger> Start an interactive environment if evaluation fails. o --eval-store <#opt-eval-store> store-url The URL of the Nix store <@docroot@/store/types/index.md#store-url-format> to use for evaluation, i.e. to store derivations (.drv files) and inputs referenced by them. o --impure <#opt-impure> Allow access to mutable paths and repositories. o --include <#opt-include> / -I path Add path to search path entries used to resolve lookup paths <@docroot@/language/constructs/lookup-path.md> This option may be given multiple times. Paths added through -I take precedence over the nix-path configuration setting <@docroot@/command-ref/conf-file.md#conf-nix-path> and the NIX_PATH environment variable <@docroot@/command-ref/env-common.md#env-NIX_PATH>. o --override-flake <#opt-override-flake> original-ref resolved-ref Override the flake registries, redirecting original-ref to resolved- ref. Common flake-related options o --commit-lock-file <#opt-commit-lock-file> Commit changes to the flake's lock file. o --inputs-from <#opt-inputs-from> flake-url Use the inputs of the specified flake as registry entries. o --no-registries <#opt-no-registries> Don't allow lookups in the flake registries. DEPRECATED Use --no-use-registries <#opt-no-use-registries> instead. o --no-update-lock-file <#opt-no-update-lock-file> Do not allow any updates to the flake's lock file. o --no-write-lock-file <#opt-no-write-lock-file> Do not write the flake's newly generated lock file. o --output-lock-file <#opt-output-lock-file> flake-lock-path Write the given lock file instead of flake.lock within the top-level flake. o --override-input <#opt-override-input> input-path flake-url Override a specific flake input (e.g. dwarffs/nixpkgs). This implies --no-write-lock-file. o --recreate-lock-file <#opt-recreate-lock-file> Recreate the flake's lock file from scratch. DEPRECATED Use nix flake update <@docroot@/command-ref/new-cli/nix3-flake-update.md> instead. o --reference-lock-file <#opt-reference-lock-file> flake-lock-path Read the given lock file instead of flake.lock within the top-level flake. o --update-input <#opt-update-input> input-path Update a specific flake input (ignoring its previous entry in the lock file). DEPRECATED Use nix flake update <@docroot@/command-ref/new-cli/nix3-flake-update.md> instead. Logging-related options o --debug <#opt-debug> Set the logging verbosity level to `debug'. o --log-format <#opt-log-format> format Set the format of log output; one of raw, internal-json, bar or bar- with-logs. o --print-build-logs <#opt-print-build-logs> / -L Print full build logs on standard error. o --quiet <#opt-quiet> Decrease the logging verbosity level. o --verbose <#opt-verbose> / -v Increase the logging verbosity level. Miscellaneous global options o --help <#opt-help> Show usage information. o --offline <#opt-offline> Disable substituters and consider all previously downloaded files up-to-date. o --option <#opt-option> name value Set the Nix configuration setting name to value (overriding nix.conf). o --refresh <#opt-refresh> Consider all previously downloaded files out-of-date. o --repair <#opt-repair> During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths. o --version <#opt-version> Show version information. Options that change the interpretation of installables o --expr <#opt-expr> expr Interpret installables <@docroot@/command-ref/new-cli/nix.md#installables> as attribute paths relative to the Nix expression expr. o --file <#opt-file> / -f file Interpret installables <@docroot@/command-ref/new-cli/nix.md#installables> as attribute paths relative to the Nix expression stored in file. If file is the character -, then a Nix expression will be read from standard input. Implies --impure. Note See man nix.conf <@docroot@/command-ref/conf-file.md#command-line-flags> for overriding configuration settings with command line flags. nix3-store-copy-log(1)