these 2 derivations will be built:
  /nix/store/f2r4lq6ffnys066fx3zqrxl0xzq0fn77-mnemopi-memory-validate.drv
  /nix/store/riyl7d1cr7j796chqdi1133b0r311f6v-apps-build.drv
this path will be fetched (0.0 KiB download, 272.7 MiB unpacked):
  /nix/store/f0n2xkrn06f8dda09zb9mpqipyf1y0bf-omp-18.10.4
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy