these 2 derivations will be built:
  /nix/store/isgfmm4rx9ydj072dxbvzfxya18c896v-clan-core-flake.drv
  /nix/store/21wi7is3kd34jk487rz1ljv6pibvwzhm-clan-pytest-with-core.drv
building '/nix/store/isgfmm4rx9ydj072dxbvzfxya18c896v-clan-core-flake.drv' on 'ssh-ng://builder@build04.clan.lol'
building '/nix/store/isgfmm4rx9ydj072dxbvzfxya18c896v-clan-core-flake.drv'
clan-core-flake> 
building '/nix/store/21wi7is3kd34jk487rz1ljv6pibvwzhm-clan-pytest-with-core.drv' on 'ssh-ng://builder@build04.clan.lol'
building '/nix/store/21wi7is3kd34jk487rz1ljv6pibvwzhm-clan-pytest-with-core.drv'
clan-pytest-with-core> +++ export HOME=/nix/var/nix/builds/nix-38584-4290109419
clan-pytest-with-core> +++ HOME=/nix/var/nix/builds/nix-38584-4290109419
clan-pytest-with-core> +++ export NIX_STATE_DIR=/nix/var/nix/builds/nix-38584-4290109419/nix
clan-pytest-with-core> +++ NIX_STATE_DIR=/nix/var/nix/builds/nix-38584-4290109419/nix
clan-pytest-with-core> +++ export NIX_CONF_DIR=/nix/var/nix/builds/nix-38584-4290109419/etc
clan-pytest-with-core> +++ NIX_CONF_DIR=/nix/var/nix/builds/nix-38584-4290109419/etc
clan-pytest-with-core> +++ mkdir -p /nix/var/nix/builds/nix-38584-4290109419/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=/nix/var/nix/builds/nix-38584-4290109419/store
clan-pytest-with-core> +++ CLAN_TEST_STORE=/nix/var/nix/builds/nix-38584-4290109419/store
clan-pytest-with-core> +++ export LOCK_NIX=/nix/var/nix/builds/nix-38584-4290109419/nix_lock
clan-pytest-with-core> +++ LOCK_NIX=/nix/var/nix/builds/nix-38584-4290109419/nix_lock
clan-pytest-with-core> +++ export CLAN_TEST_FLAKE_CACHE=/nix/var/nix/builds/nix-38584-4290109419/clan-flake-cache
clan-pytest-with-core> +++ CLAN_TEST_FLAKE_CACHE=/nix/var/nix/builds/nix-38584-4290109419/clan-flake-cache
clan-pytest-with-core> +++ mkdir -p /nix/var/nix/builds/nix-38584-4290109419/store/nix/store /nix/var/nix/builds/nix-38584-4290109419/clan-flake-cache
clan-pytest-with-core> +++ mkdir -p /nix/var/nix/builds/nix-38584-4290109419/store/nix/var/nix/gcroots
clan-pytest-with-core> +++ [[ -n /nix/store/mgwf27ci04ifqgnfhgpm7glr1gsc107s-closure-info ]]
clan-pytest-with-core> ++++ nproc
clan-pytest-with-core> +++ /nix/store/31sq3pgm1c39grq3l3gjmdnc7x3f68n4-findutils-4.11.0/bin/xargs -r -P10 /nix/store/q5fm76ljl27nai13va4ya1y8n9sf3n87-coreutils-9.11/bin/cp --recursive --no-dereference --reflink=auto --target-directory /nix/var/nix/builds/nix-38584-4290109419/store/nix/store