these 4 derivations will be built:
  /nix/store/f5r194qdzxkrwj7cji64rd1mh15iyds9-iets-static-x86_64-unknown-linux-musl-0.2.0.drv
  /nix/store/rb4hk6hd87p5s0wdy4820iqp9lbs3n1l-iets-static-aarch64-unknown-linux-musl-0.2.0.drv
  /nix/store/hlpy8df8mwj9b1sskqmlbw8i2fyc989g-iets-release-0.2.0.drv
  /nix/store/iaa4xfczzdhdfayr5sm9ynpzd4p8b4cm-inputDerivation-effect-release.drv
building '/nix/store/rb4hk6hd87p5s0wdy4820iqp9lbs3n1l-iets-static-aarch64-unknown-linux-musl-0.2.0.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=20&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'...
building '/nix/store/f5r194qdzxkrwj7cji64rd1mh15iyds9-iets-static-x86_64-unknown-linux-musl-0.2.0.drv'...
copying 1 paths...
copying path '/nix/store/vw85lvwndmkl8x5mxm11wjgb0m3n17gn-source' to 'grpc://farm.numtide.com:50051'...
copying 1 paths to 'farm.numtide.com:50051'...
copying path '/nix/store/rb4hk6hd87p5s0wdy4820iqp9lbs3n1l-iets-static-aarch64-unknown-linux-musl-0.2.0.drv' to 'farm.numtide.com:50051'...
building '/nix/store/rb4hk6hd87p5s0wdy4820iqp9lbs3n1l-iets-static-aarch64-unknown-linux-musl-0.2.0.drv' on farm.numtide.com:50051...
copying 1 paths...
copying path '/nix/store/ijxi5ljdjznndn72jr0cizpxmdj6pbva-iets-static-aarch64-unknown-linux-musl-0.2.0' from 'grpc://farm.numtide.com:50051'...
building '/nix/store/hlpy8df8mwj9b1sskqmlbw8i2fyc989g-iets-release-0.2.0.drv'...
building '/nix/store/iaa4xfczzdhdfayr5sm9ynpzd4p8b4cm-inputDerivation-effect-release.drv'...