these 4 derivations will be built:
  /nix/store/qiz8izq65wb1wysh5rj2ww95kd5d8rbv-source.drv
  /nix/store/lckpbz0nfd5hv2pza3q6zzdj6fkbzwcn-mercat-0.3.7-zig-deps.drv
  /nix/store/0bzisagzfdnflrl81rgzjrrw11l5iv0v-mercat-0.3.7.drv
  /nix/store/2b5488jzhh62l2d7392ahw55l5g52vc2-check-mercat.drv
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
cannot build on 'grpc://farm.numtide.com:50051?connect-timeout=20&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token': error: gRPC StoreInfo on 'farm.numtide.com:50051' failed: no healthy upstream
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
cannot build on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token': error: gRPC StoreInfo on 'farm.numtide.com:50051' failed: no healthy upstream
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
cannot build on 'grpc://farm.numtide.com:50051?connect-timeout=22&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token': error: gRPC StoreInfo on 'farm.numtide.com:50051' failed: no healthy upstream
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
farm.numtide.com:50051: no healthy upstream, retrying
cannot build on 'grpc://farm.numtide.com:50051?connect-timeout=23&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token': error: gRPC StoreInfo on 'farm.numtide.com:50051' failed: no healthy upstream
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
Failed to find a machine for remote build!
derivation: 0bzisagzfdnflrl81rgzjrrw11l5iv0v-mercat-0.3.7.drv
required (system, features): (aarch64-linux, [])
12 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin], 8, [apple-virt, big-parallel, nixos-test, recursive-nix], [])
([aarch64-darwin], 8, [apple-virt, big-parallel, nixos-test, recursive-nix], [])
([aarch64-darwin], 8, [apple-virt, big-parallel, nixos-test, recursive-nix], [])
([aarch64-darwin], 8, [apple-virt, big-parallel, nixos-test, recursive-nix], [])
([aarch64-linux], 8, [big-parallel, kvm, nixos-test, recursive-nix, uid-range], [])
([aarch64-linux], 8, [big-parallel, kvm, nixos-test, recursive-nix, uid-range], [])
([aarch64-linux], 8, [big-parallel, kvm, nixos-test, recursive-nix, uid-range], [])
([aarch64-linux], 8, [big-parallel, kvm, nixos-test, recursive-nix, uid-range], [])
([x86_64-darwin], 8, [big-parallel, nixos-test, recursive-nix], [])
([x86_64-darwin], 8, [big-parallel, nixos-test, recursive-nix], [])
([x86_64-darwin], 8, [big-parallel, nixos-test, recursive-nix], [])
([x86_64-darwin], 8, [big-parallel, nixos-test, recursive-nix], [])
error: Cannot build '/nix/store/0bzisagzfdnflrl81rgzjrrw11l5iv0v-mercat-0.3.7.drv'.
       Reason: platform mismatch
       Required system: 'aarch64-linux'
       Current system: 'x86_64-linux'
error: Cannot build '/nix/store/2b5488jzhh62l2d7392ahw55l5g52vc2-check-mercat.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/3py80lwy7168lm23s3x8ya613wh170y5-check-mercat