these 2 derivations will be built:
  /nix/store/xfbnlb6y35w4ngdvfadbwcspn2c79rda-qmd-2.8.3.drv
  /nix/store/2fwqb807sdqhm7z1zqni2drz0ndg0382-check-qmd.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy