this derivation will be built:
  /nix/store/k5d8qvfffp0nvjvmy0q8s5cd17vfbis3-spec-kdlfmt.drv
building '/nix/store/k5d8qvfffp0nvjvmy0q8s5cd17vfbis3-spec-kdlfmt.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=23&system=aarch64-linux'
building '/nix/store/k5d8qvfffp0nvjvmy0q8s5cd17vfbis3-spec-kdlfmt.drv' on farm.numtide.com:50051
spec-kdlfmt> elastic-arm-234f8218: building k5d8qvfffp0nvjvmy0q8s5cd17vfbis3-spec-kdlfmt.drv
spec-kdlfmt> deep/x/y/a.kdl finished in 0ms
spec-kdlfmt> shallow/a.kdl finished in 0ms
spec-kdlfmt> 2 files was formatted in 0ms
spec-kdlfmt> shallow/a.kdl finished in 0ms (unchanged)
spec-kdlfmt> 1 file was formatted in 0ms
spec-kdlfmt> Error parsing file 'invalid/a.kdl' -   x Failed to parse KDL document
spec-kdlfmt> 
spec-kdlfmt> Error: 
spec-kdlfmt>   x Expected closing '}' in node children block.
spec-kdlfmt>    ,----
spec-kdlfmt>  1 | node {
spec-kdlfmt>    :      ^|
spec-kdlfmt>    :       `-- children block body
spec-kdlfmt>    `----
spec-kdlfmt> 
spec-kdlfmt> shallow/a.kdl finished in 0ms (unchanged)
spec-kdlfmt> Error parsing file 'invalid/a.kdl' -   x Failed to parse KDL document
spec-kdlfmt> 
spec-kdlfmt> Error: 
spec-kdlfmt>   x Expected closing '}' in node children block.
spec-kdlfmt>    ,----
spec-kdlfmt>  1 | node {
spec-kdlfmt>    :      ^|
spec-kdlfmt>    :       `-- children block body
spec-kdlfmt>    `----
spec-kdlfmt> 

upload niks3: ok