these 2 derivations will be built:
  /nix/store/8dsnzx7kid8n27qd93im9byvhhbz8yjc-cargo-vendor-dir.drv
  /nix/store/a3r83sl0v56p33dyjmr5awjka50hj911-fast-nix-gc-proptest-0.1.0.drv
building '/nix/store/8dsnzx7kid8n27qd93im9byvhhbz8yjc-cargo-vendor-dir.drv' on 'ssh-ng://nix@jamie'
building '/nix/store/8dsnzx7kid8n27qd93im9byvhhbz8yjc-cargo-vendor-dir.drv'
cargo-vendor-dir> structuredAttrs is enabled
building '/nix/store/a3r83sl0v56p33dyjmr5awjka50hj911-fast-nix-gc-proptest-0.1.0.drv' on 'ssh-ng://nix@jamie'
building '/nix/store/a3r83sl0v56p33dyjmr5awjka50hj911-fast-nix-gc-proptest-0.1.0.drv'
fast-nix-gc-proptest-0.1.0> Running phase: unpackPhase
fast-nix-gc-proptest-0.1.0> unpacking source archive /nix/store/v2r4fhf472bnky9hd4bqyixlybpgb7ib-source
fast-nix-gc-proptest-0.1.0> source root is source
fast-nix-gc-proptest-0.1.0> Executing cargoSetupPostUnpackHook
fast-nix-gc-proptest-0.1.0> Finished cargoSetupPostUnpackHook
fast-nix-gc-proptest-0.1.0> Running phase: patchPhase
fast-nix-gc-proptest-0.1.0> Executing cargoSetupPostPatchHook
fast-nix-gc-proptest-0.1.0> Validating consistency between /build/source/Cargo.lock and /build/cargo-vendor-dir/Cargo.lock
fast-nix-gc-proptest-0.1.0> Finished cargoSetupPostPatchHook
fast-nix-gc-proptest-0.1.0> Running phase: updateAutotoolsGnuConfigScriptsPhase
fast-nix-gc-proptest-0.1.0> Running phase: configurePhase
fast-nix-gc-proptest-0.1.0> Running phase: buildPhase
fast-nix-gc-proptest-0.1.0> Executing cargoBuildHook
fast-nix-gc-proptest-0.1.0> cargoBuildHook flags: -j 384 --target x86_64-unknown-linux-gnu --offline --profile release
fast-nix-gc-proptest-0.1.0> error: failed to load manifest for workspace member `/build/source/difftest`
fast-nix-gc-proptest-0.1.0> referenced by workspace at `/build/source/Cargo.toml`
fast-nix-gc-proptest-0.1.0> 
fast-nix-gc-proptest-0.1.0> Caused by:
fast-nix-gc-proptest-0.1.0>   failed to read `/build/source/difftest/Cargo.toml`
fast-nix-gc-proptest-0.1.0> 
fast-nix-gc-proptest-0.1.0> Caused by:
fast-nix-gc-proptest-0.1.0>   No such file or directory (os error 2)
error: build of '/nix/store/a3r83sl0v56p33dyjmr5awjka50hj911-fast-nix-gc-proptest-0.1.0.drv' on 'ssh-ng://nix@jamie' failed: Cannot build '/nix/store/a3r83sl0v56p33dyjmr5awjka50hj911-fast-nix-gc-proptest-0.1.0.drv'.
       Reason: builder failed with exit code 101.
       Output paths:
         /nix/store/f8lfrhwd9ri2j1agm3jsfbn0v8k82ax0-fast-nix-gc-proptest-0.1.0
       Last 22 log lines:
       > Running phase: unpackPhase
       > unpacking source archive /nix/store/v2r4fhf472bnky9hd4bqyixlybpgb7ib-source
       > source root is source
       > Executing cargoSetupPostUnpackHook
       > Finished cargoSetupPostUnpackHook
       > Running phase: patchPhase
       > Executing cargoSetupPostPatchHook
       > Validating consistency between /build/source/Cargo.lock and /build/cargo-vendor-dir/Cargo.lock
       > Finished cargoSetupPostPatchHook
       > Running phase: updateAutotoolsGnuConfigScriptsPhase
       > Running phase: configurePhase
       > Running phase: buildPhase
       > Executing cargoBuildHook
       > cargoBuildHook flags: -j 384 --target x86_64-unknown-linux-gnu --offline --profile release
       > error: failed to load manifest for workspace member `/build/source/difftest`
       > referenced by workspace at `/build/source/Cargo.toml`
       >
       > Caused by:
       >   failed to read `/build/source/difftest/Cargo.toml`
       >
       > Caused by:
       >   No such file or directory (os error 2)
       For full logs, run:
         nix log /nix/store/a3r83sl0v56p33dyjmr5awjka50hj911-fast-nix-gc-proptest-0.1.0.drv
error: Cannot build '/nix/store/a3r83sl0v56p33dyjmr5awjka50hj911-fast-nix-gc-proptest-0.1.0.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/f8lfrhwd9ri2j1agm3jsfbn0v8k82ax0-fast-nix-gc-proptest-0.1.0