this derivation will be built:
  /nix/store/r1c07n1b6v5zf5hkv38spgx3plsig9bp-clan-pytest-with-core.drv
building '/nix/store/r1c07n1b6v5zf5hkv38spgx3plsig9bp-clan-pytest-with-core.drv' on 'ssh-ng://builder@build01.clan.lol'
building '/nix/store/r1c07n1b6v5zf5hkv38spgx3plsig9bp-clan-pytest-with-core.drv'
clan-pytest-with-core> +++ export HOME=/build
clan-pytest-with-core> +++ HOME=/build
clan-pytest-with-core> +++ export NIX_STATE_DIR=/build/nix
clan-pytest-with-core> +++ NIX_STATE_DIR=/build/nix
clan-pytest-with-core> +++ export NIX_CONF_DIR=/build/etc
clan-pytest-with-core> +++ NIX_CONF_DIR=/build/etc
clan-pytest-with-core> +++ mkdir -p /build/etc
clan-pytest-with-core> +++ echo 'fsync-metadata = false'
clan-pytest-with-core> +++ export IN_NIX_SANDBOX=1
clan-pytest-with-core> +++ IN_NIX_SANDBOX=1
clan-pytest-with-core> +++ export CLAN_TEST_STORE=/build/store
clan-pytest-with-core> +++ CLAN_TEST_STORE=/build/store
clan-pytest-with-core> +++ export LOCK_NIX=/build/nix_lock
clan-pytest-with-core> +++ LOCK_NIX=/build/nix_lock
clan-pytest-with-core> +++ export CLAN_TEST_FLAKE_CACHE=/build/clan-flake-cache
clan-pytest-with-core> +++ CLAN_TEST_FLAKE_CACHE=/build/clan-flake-cache
clan-pytest-with-core> +++ mkdir -p /build/store/nix/store /build/clan-flake-cache
clan-pytest-with-core> +++ mkdir -p /build/store/nix/var/nix/gcroots
clan-pytest-with-core> +++ [[ -n /nix/store/nn6rf69jjgcmfwvz5bycgfxj98sfdir4-closure-info ]]
clan-pytest-with-core> ++++ nproc
clan-pytest-with-core> +++ /nix/store/47s1v9jk5hp88jwkkad6fzsyzq4hasla-findutils-4.10.0/bin/xargs -r -P80 /nix/store/3da6dbbp462hxhhxxrlilv3022fn2mc5-coreutils-9.11/bin/cp --recursive --no-dereference --reflink=auto --target-directory /build/store/nix/store