[INFO] cloning repository https://github.com/mdabir1203/GPT2Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mdabir1203/GPT2Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdabir1203%2FGPT2Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdabir1203%2FGPT2Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] de650b66f4bff5fd3ed235b570b2194efb1de2a5
[INFO] testing mdabir1203/GPT2Rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdabir1203%2FGPT2Rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] finished tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] tweaked toml for git repo https://github.com/mdabir1203/GPT2Rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mdabir1203/GPT2Rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `nix`.
[INFO] [stderr]     ... required by package `mini-docker v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.27` are: 0.27.1, 0.27.0
[INFO] [stderr] 
[INFO] [stderr] package `mini-docker` depends on `nix` with feature `unistd` but `nix` does not have that feature.
[INFO] [stderr]  available features: acct, aio, default, dir, env, event, feature, fs, hostname, inotify, ioctl, kmod, memoffset, mman, mount, mqueue, net, personality, pin-utils, poll, process, pthread, ptrace, quota, reboot, resource, sched, signal, socket, term, time, ucontext, uio, user, zerocopy
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `nix` which could resolve this conflict
[INFO] testing mdabir1203/GPT2Rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdabir1203%2FGPT2Rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] finished tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] tweaked toml for git repo https://github.com/mdabir1203/GPT2Rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mdabir1203/GPT2Rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `nix`.
[INFO] [stderr]     ... required by package `mini-docker v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.27` are: 0.27.1, 0.27.0
[INFO] [stderr] 
[INFO] [stderr] package `mini-docker` depends on `nix` with feature `unistd` but `nix` does not have that feature.
[INFO] [stderr]  available features: acct, aio, default, dir, env, event, feature, fs, hostname, inotify, ioctl, kmod, memoffset, mman, mount, mqueue, net, personality, pin-utils, poll, process, pthread, ptrace, quota, reboot, resource, sched, signal, socket, term, time, ucontext, uio, user, zerocopy
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `nix` which could resolve this conflict
[INFO] testing mdabir1203/GPT2Rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdabir1203%2FGPT2Rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] finished tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] tweaked toml for git repo https://github.com/mdabir1203/GPT2Rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mdabir1203/GPT2Rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `nix`.
[INFO] [stderr]     ... required by package `mini-docker v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.27` are: 0.27.1, 0.27.0
[INFO] [stderr] 
[INFO] [stderr] package `mini-docker` depends on `nix` with feature `unistd` but `nix` does not have that feature.
[INFO] [stderr]  available features: acct, aio, default, dir, env, event, feature, fs, hostname, inotify, ioctl, kmod, memoffset, mman, mount, mqueue, net, personality, pin-utils, poll, process, pthread, ptrace, quota, reboot, resource, sched, signal, socket, term, time, ucontext, uio, user, zerocopy
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `nix` which could resolve this conflict
[INFO] testing mdabir1203/GPT2Rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdabir1203%2FGPT2Rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] finished tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] tweaked toml for git repo https://github.com/mdabir1203/GPT2Rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mdabir1203/GPT2Rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `nix`.
[INFO] [stderr]     ... required by package `mini-docker v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.27` are: 0.27.1, 0.27.0
[INFO] [stderr] 
[INFO] [stderr] package `mini-docker` depends on `nix` with feature `unistd` but `nix` does not have that feature.
[INFO] [stderr]  available features: acct, aio, default, dir, env, event, feature, fs, hostname, inotify, ioctl, kmod, memoffset, mman, mount, mqueue, net, personality, pin-utils, poll, process, pthread, ptrace, quota, reboot, resource, sched, signal, socket, term, time, ucontext, uio, user, zerocopy
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `nix` which could resolve this conflict
[INFO] testing mdabir1203/GPT2Rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdabir1203%2FGPT2Rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] finished tweaking git repo https://github.com/mdabir1203/GPT2Rust
[INFO] tweaked toml for git repo https://github.com/mdabir1203/GPT2Rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mdabir1203/GPT2Rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `nix`.
[INFO] [stderr]     ... required by package `mini-docker v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.27` are: 0.27.1, 0.27.0
[INFO] [stderr] 
[INFO] [stderr] package `mini-docker` depends on `nix` with feature `unistd` but `nix` does not have that feature.
[INFO] [stderr]  available features: acct, aio, default, dir, env, event, feature, fs, hostname, inotify, ioctl, kmod, memoffset, mman, mount, mqueue, net, personality, pin-utils, poll, process, pthread, ptrace, quota, reboot, resource, sched, signal, socket, term, time, ucontext, uio, user, zerocopy
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `nix` which could resolve this conflict


command failed: exit status: 101

    Updating crates.io index
error: failed to select a version for `nix`.
    ... required by package `mini-docker v0.1.0 (/workspace/builds/worker-1-tc2/source)`
versions that meet the requirements `^0.27` are: 0.27.1, 0.27.0

package `mini-docker` depends on `nix` with feature `unistd` but `nix` does not have that feature.
 available features: acct, aio, default, dir, env, event, feature, fs, hostname, inotify, ioctl, kmod, memoffset, mman, mount, mqueue, net, personality, pin-utils, poll, process, pthread, ptrace, quota, reboot, resource, sched, signal, socket, term, time, ucontext, uio, user, zerocopy


failed to select a version for `nix` which could resolve this conflict