this derivation will be built:
  /nix/store/mng1bm64sivpg6cdhzr86xnmc5ri2861-spec-fracjson.drv
building '/nix/store/mng1bm64sivpg6cdhzr86xnmc5ri2861-spec-fracjson.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-darwin'
building '/nix/store/mng1bm64sivpg6cdhzr86xnmc5ri2861-spec-fracjson.drv' on farm.numtide.com:50051
spec-fracjson> mac02: building mng1bm64sivpg6cdhzr86xnmc5ri2861-spec-fracjson.drv
spec-fracjson> Unexpected comma while processing object at idx=7, row=0, col=7
spec-fracjson> Unexpected comma while processing object at idx=7, row=0, col=7

upload niks3: ok