this derivation will be built:
  /nix/store/2l4l9qdc5a3344xm29s0z2vvql3am8l8-treefmt-check.drv
building '/nix/store/2l4l9qdc5a3344xm29s0z2vvql3am8l8-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 944 files
treefmt-check> emitted 239 files for processing
treefmt-check> formatted 239 files (0 changed) in 635ms