these 4 derivations will be built:
  /nix/store/049agdab9q3a7s0vkj7vxwk7qkwnjbch-harvest-exporter-0.1.0.drv
  /nix/store/hg1di2c8cmddy2nl0hahnlnrz1lrw4p9-treefmt.toml.drv
  /nix/store/k05fdhr1mvf687yy20ajar6mjakwk9k7-treefmt.drv
  /nix/store/2vwrfqdg3dlx2d9cg0k2ham4rsfp5qba-treefmt-check.drv
these 2 paths will be fetched (25.6 KiB download, 100.0 KiB unpacked):
  /nix/store/f198hq48l3mbas02g84mqszgxzdrsda3-python3.14-types-requests-2.32.4.20260107
  /nix/store/5sjllyp8g0k0n2jj1jl2f64lfbxd541a-python3.14-types-urllib3-1.26.25.14
error: Cannot build '/nix/store/2vwrfqdg3dlx2d9cg0k2ham4rsfp5qba-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/75dwc27n6k7gww8b77rinmlwmyb0655b-treefmt-check
       Last 25 log lines:
       >
       > CPY001 Missing copyright notice at top of file
       > --> packages/harvest-invoicer/src/harvest_invoicer/db.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> packages/harvest-invoicer/src/harvest_invoicer/fetch.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> packages/harvest-invoicer/src/harvest_invoicer/i18n.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> packages/harvest-invoicer/src/harvest_invoicer/mail.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> packages/harvest-invoicer/src/harvest_invoicer/model.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> packages/harvest-invoicer/src/harvest_invoicer/render.py:1:1
       >
       > Found 16 errors (1 fixed, 15 remaining).
       >
       > traversed 200 files
       > emitted 115 files for processing
       > formatted 18 files (1 changed) in 4.727s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/2vwrfqdg3dlx2d9cg0k2ham4rsfp5qba-treefmt-check.drv