ChildContext: Add command_boxed - #37

warning: ignoring untrusted flake configuration setting 'extra-substituters'.
Pass '--accept-flake-config' to trust it
warning: ignoring untrusted flake configuration setting 'extra-trusted-public-keys'.
Pass '--accept-flake-config' to trust it
warning: ignoring untrusted flake configuration setting 'extra-trusted-substituters'.
Pass '--accept-flake-config' to trust it
this derivation will be built:
  /nix/store/9pxcwzlw6krvfzwcpw5jaxv69ldw49h5-command-error-fmt-0.7.0.drv
this derivation will be built:
  /nix/store/9pxcwzlw6krvfzwcpw5jaxv69ldw49h5-command-error-fmt-0.7.0.drv
command-error-fmt-0.7.0> cargoVendorDir not set, will not automatically configure vendored sources
command-error-fmt-0.7.0> cargoArtifacts not set, will not reuse any cargo artifacts
command-error-fmt-0.7.0> Running phase: unpackPhase
command-error-fmt-0.7.0> unpacking source archive /nix/store/zfc12ysd4kwyg4yhs0qs65srnzxjhicr-source
command-error-fmt-0.7.0> source root is source
command-error-fmt-0.7.0> Running phase: patchPhase
command-error-fmt-0.7.0> Executing configureCargoCommonVars
command-error-fmt-0.7.0> Running phase: updateAutotoolsGnuConfigScriptsPhase
command-error-fmt-0.7.0> Running phase: configurePhase
command-error-fmt-0.7.0> default configurePhase, nothing to do
command-error-fmt-0.7.0> Running phase: buildPhase
command-error-fmt-0.7.0> ++ command cargo --version
command-error-fmt-0.7.0> cargo 1.82.0 (8f40fc59f 2024-08-21)
command-error-fmt-0.7.0> ++ command cargo fmt -- --check
command-error-fmt-0.7.0> Running phase: ensureTargetDir
command-error-fmt-0.7.0> Running phase: installPhase
command-error-fmt-0.7.0> incremental zstd compression not currently supported on Darwin: https://github.com/rust-lang/rust/issues/115982
command-error-fmt-0.7.0> doing a full archive install of target to /nix/store/g0fcvbwsipn7jxpj0g7399fk4m2qn326-command-error-fmt-0.7.0/target.tar.zst
command-error-fmt-0.7.0> /*stdin*\            :  0.72%   (  10.0 KiB =>     74 B, /nix/store/g0fcvbwsipn7jxpj0g7399fk4m2qn326-command-error-fmt-0.7.0/target.tar.zst) 
command-error-fmt-0.7.0> Running phase: fixupPhase
command-error-fmt-0.7.0> checking for references to /private/tmp/nix-build-command-error-fmt-0.7.0.drv-0/ in /nix/store/g0fcvbwsipn7jxpj0g7399fk4m2qn326-command-error-fmt-0.7.0...
command-error-fmt-0.7.0> patching script interpreter paths in /nix/store/g0fcvbwsipn7jxpj0g7399fk4m2qn326-command-error-fmt-0.7.0