these 3 derivations will be built:
  /nix/store/7n2fvsbsa3mmlhdcwrvymig7722qv4a3-treefmt.toml.drv
  /nix/store/mfmn1837akvh0r7c61nkw7nmfnrf5cb3-treefmt.drv
  /nix/store/0i67azl6wxvhs3j22phss0lxig7l8wkb-treefmt-check.drv
building '/nix/store/7n2fvsbsa3mmlhdcwrvymig7722qv4a3-treefmt.toml.drv'
treefmt.toml> tribuchet: building on jamie
treefmt.toml> structuredAttrs is enabled
building '/nix/store/mfmn1837akvh0r7c61nkw7nmfnrf5cb3-treefmt.drv'
treefmt> tribuchet: building on jamie
treefmt> mv: cannot remove '/build/.attr-1lf969yddshzhld7sr1vbagr07bnygg99lgl6gk5kxcnp4z9wbcq': Operation not permitted
error: Cannot build '/nix/store/mfmn1837akvh0r7c61nkw7nmfnrf5cb3-treefmt.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/m0ywkf0i98zd95wswhsgvcvk1lq0yf0z-treefmt
       Last 2 log lines:
       > tribuchet: building on jamie
       > mv: cannot remove '/build/.attr-1lf969yddshzhld7sr1vbagr07bnygg99lgl6gk5kxcnp4z9wbcq': Operation not permitted
       For full logs, run:
         nix log /nix/store/mfmn1837akvh0r7c61nkw7nmfnrf5cb3-treefmt.drv
error: Cannot build '/nix/store/0i67azl6wxvhs3j22phss0lxig7l8wkb-treefmt-check.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/25ay2qa3ll7y1fglrnlncbyx7i8jwghn-treefmt-check