these 2 derivations will be built:
  /nix/store/s20wvwnd4cz265gn4bk2gifk7g8275q2-closure-info.drv
  /nix/store/1y3s0vz1cz18l5y7rgmyb8g9cbwl87jn-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
error: path '/nix/store/h7z14lykvad7asb4lgvywqalmcryf83d-check-vars' is not valid
error: Cannot build '/nix/store/1y3s0vz1cz18l5y7rgmyb8g9cbwl87jn-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/h7z14lykvad7asb4lgvywqalmcryf83d-check-vars